Finding the Fourth Proportional to 129,632.84, 178,892.24 and 72,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,632.84 : 178,892.24 = 72,271.50 : x
2. Step 2: Convert to fraction form
   129,632.84/178,892.24 = 72,271.50/x
3. Step 3: Cross multiply
   129,632.84x = 178,892.24 × 72,271.50
4. Step 4: Simplify right side
   129,632.84x = 12,928,810,523.16
5. Step 5: Solve for x
   x = 12,928,810,523.16/129,632.84
6. Step 6: Final answer
   x = 99,734.07