Finding the Fourth Proportional to 15,485,997.56, 21,369,565.32 and 8,517,158.42

Step by Step Solution

1. Step 1: Write the proportion equation
   15,485,997.56 : 21,369,565.32 = 8,517,158.42 : x
2. Step 2: Convert to fraction form
   15,485,997.56/21,369,565.32 = 8,517,158.42/x
3. Step 3: Cross multiply
   15,485,997.56x = 21,369,565.32 × 8,517,158.42
4. Step 4: Simplify right side
   15,485,997.56x = 182,007,973,196,978
5. Step 5: Solve for x
   x = 182,007,973,196,978/15,485,997.56
6. Step 6: Final answer
   x = 11,753,067.41