Finding the Fourth Proportional to 126,114.24, 174,024.72 and 72,386.40

Step by Step Solution

1. Step 1: Write the proportion equation
   126,114.24 : 174,024.72 = 72,386.40 : x
2. Step 2: Convert to fraction form
   126,114.24/174,024.72 = 72,386.40/x
3. Step 3: Cross multiply
   126,114.24x = 174,024.72 × 72,386.40
4. Step 4: Simplify right side
   126,114.24x = 12,597,022,991.81
5. Step 5: Solve for x
   x = 12,597,022,991.81/126,114.24
6. Step 6: Final answer
   x = 99,885.81