Finding the Fourth Proportional to 102,578,937.30, 141,560,499.69 and 56,173,509.18

Step by Step Solution

1. Step 1: Write the proportion equation
   102,578,937.30 : 141,560,499.69 = 56,173,509.18 : x
2. Step 2: Convert to fraction form
   102,578,937.30/141,560,499.69 = 56,173,509.18/x
3. Step 3: Cross multiply
   102,578,937.30x = 141,560,499.69 × 56,173,509.18
4. Step 4: Simplify right side
   102,578,937.30x = 7,951,950,028,861,602
5. Step 5: Solve for x
   x = 7,951,950,028,861,602/102,578,937.30
6. Step 6: Final answer
   x = 77,520,300.35