Finding the Fourth Proportional to 99,485,844.96, 137,291,010.69 and 57,694,688.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99,485,844.96 : 137,291,010.69 = 57,694,688.34 : x
2. Step 2: Convert to fraction form
   99,485,844.96/137,291,010.69 = 57,694,688.34/x
3. Step 3: Cross multiply
   99,485,844.96x = 137,291,010.69 × 57,694,688.34
4. Step 4: Simplify right side
   99,485,844.96x = 7,920,962,073,643,159
5. Step 5: Solve for x
   x = 7,920,962,073,643,159/99,485,844.96
6. Step 6: Final answer
   x = 79,618,985.76