Finding the Fourth Proportional to 126,401.33, 174,430.77 and 72,685.11

Step by Step Solution

1. Step 1: Write the proportion equation
   126,401.33 : 174,430.77 = 72,685.11 : x
2. Step 2: Convert to fraction form
   126,401.33/174,430.77 = 72,685.11/x
3. Step 3: Cross multiply
   126,401.33x = 174,430.77 × 72,685.11
4. Step 4: Simplify right side
   126,401.33x = 12,678,520,086.38
5. Step 5: Solve for x
   x = 12,678,520,086.38/126,401.33
6. Step 6: Final answer
   x = 100,303.69