Finding the Fourth Proportional to 78,209,322.99, 117,334,429.52 and 45,388,340.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,209,322.99 : 117,334,429.52 = 45,388,340.81 : x
2. Step 2: Convert to fraction form
   78,209,322.99/117,334,429.52 = 45,388,340.81/x
3. Step 3: Cross multiply
   78,209,322.99x = 117,334,429.52 × 45,388,340.81
4. Step 4: Simplify right side
   78,209,322.99x = 5,325,615,075,800,685
5. Step 5: Solve for x
   x = 5,325,615,075,800,685/78,209,322.99
6. Step 6: Final answer
   x = 68,094,376.38