Finding the Fourth Proportional to 129,105.56, 178,182.38 and 72,516.94

Step by Step Solution

1. Step 1: Write the proportion equation
   129,105.56 : 178,182.38 = 72,516.94 : x
2. Step 2: Convert to fraction form
   129,105.56/178,182.38 = 72,516.94/x
3. Step 3: Cross multiply
   129,105.56x = 178,182.38 × 72,516.94
4. Step 4: Simplify right side
   129,105.56x = 12,921,240,695.35
5. Step 5: Solve for x
   x = 12,921,240,695.35/129,105.56
6. Step 6: Final answer
   x = 100,082.76