Finding the Fourth Proportional to 129,056.08, 178,087.24 and 72,456.52

Step by Step Solution

1. Step 1: Write the proportion equation
   129,056.08 : 178,087.24 = 72,456.52 : x
2. Step 2: Convert to fraction form
   129,056.08/178,087.24 = 72,456.52/x
3. Step 3: Cross multiply
   129,056.08x = 178,087.24 × 72,456.52
4. Step 4: Simplify right side
   129,056.08x = 12,903,581,666.80
5. Step 5: Solve for x
   x = 12,903,581,666.80/129,056.08
6. Step 6: Final answer
   x = 99,984.30