Finding the Fourth Proportional to 105,150.28, 157,565.83 and 77,089.02

Step by Step Solution

1. Step 1: Write the proportion equation
   105,150.28 : 157,565.83 = 77,089.02 : x
2. Step 2: Convert to fraction form
   105,150.28/157,565.83 = 77,089.02/x
3. Step 3: Cross multiply
   105,150.28x = 157,565.83 × 77,089.02
4. Step 4: Simplify right side
   105,150.28x = 12,146,594,997.95
5. Step 5: Solve for x
   x = 12,146,594,997.95/105,150.28
6. Step 6: Final answer
   x = 115,516.53