Finding the Fourth Proportional to 78,682,698.42, 108,538,533.90 and 55,196,203.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,682,698.42 : 108,538,533.90 = 55,196,203.18 : x
2. Step 2: Convert to fraction form
   78,682,698.42/108,538,533.90 = 55,196,203.18/x
3. Step 3: Cross multiply
   78,682,698.42x = 108,538,533.90 × 55,196,203.18
4. Step 4: Simplify right side
   78,682,698.42x = 5,990,914,970,003,718
5. Step 5: Solve for x
   x = 5,990,914,970,003,718/78,682,698.42
6. Step 6: Final answer
   x = 76,140,181.90