Finding the Fourth Proportional to 80,688,134,193.20, 121,105,647,321.72 and 42,946,395,429.68

Step by Step Solution

1. Step 1: Write the proportion equation
   80,688,134,193.20 : 121,105,647,321.72 = 42,946,395,429.68 : x
2. Step 2: Convert to fraction form
   80,688,134,193.20/121,105,647,321.72 = 42,946,395,429.68/x
3. Step 3: Cross multiply
   80,688,134,193.20x = 121,105,647,321.72 × 42,946,395,429.68
4. Step 4: Simplify right side
   80,688,134,193.20x = 5,201,051,018,645,953,576,960
5. Step 5: Solve for x
   x = 5,201,051,018,645,953,576,960/80,688,134,193.20
6. Step 6: Final answer
   x = 64,458,684,918.81