Finding the Fourth Proportional to 99,174.96, 136,856.52 and 56,147.76

Step by Step Solution

1. Step 1: Write the proportion equation
   99,174.96 : 136,856.52 = 56,147.76 : x
2. Step 2: Convert to fraction form
   99,174.96/136,856.52 = 56,147.76/x
3. Step 3: Cross multiply
   99,174.96x = 136,856.52 × 56,147.76
4. Step 4: Simplify right side
   99,174.96x = 7,684,187,039.40
5. Step 5: Solve for x
   x = 7,684,187,039.40/99,174.96
6. Step 6: Final answer
   x = 77,481.12