Finding the Fourth Proportional to 129,084.31, 178,153.06 and 72,495.69

Step by Step Solution

1. Step 1: Write the proportion equation
   129,084.31 : 178,153.06 = 72,495.69 : x
2. Step 2: Convert to fraction form
   129,084.31/178,153.06 = 72,495.69/x
3. Step 3: Cross multiply
   129,084.31x = 178,153.06 × 72,495.69
4. Step 4: Simplify right side
   129,084.31x = 12,915,329,010.31
5. Step 5: Solve for x
   x = 12,915,329,010.31/129,084.31
6. Step 6: Final answer
   x = 100,053.44