Finding the Fourth Proportional to 126,301.20, 174,330 and 72,591.72

Step by Step Solution

1. Step 1: Write the proportion equation
   126,301.20 : 174,330 = 72,591.72 : x
2. Step 2: Convert to fraction form
   126,301.20/174,330 = 72,591.72/x
3. Step 3: Cross multiply
   126,301.20x = 174,330 × 72,591.72
4. Step 4: Simplify right side
   126,301.20x = 12,654,914,547.60
5. Step 5: Solve for x
   x = 12,654,914,547.60/126,301.20
6. Step 6: Final answer
   x = 100,196.31