Finding the Fourth Proportional to 126,104.56, 174,031.72 and 72,389.68

Step by Step Solution

1. Step 1: Write the proportion equation
   126,104.56 : 174,031.72 = 72,389.68 : x
2. Step 2: Convert to fraction form
   126,104.56/174,031.72 = 72,389.68/x
3. Step 3: Cross multiply
   126,104.56x = 174,031.72 × 72,389.68
4. Step 4: Simplify right side
   126,104.56x = 12,598,100,520.65
5. Step 5: Solve for x
   x = 12,598,100,520.65/126,104.56
6. Step 6: Final answer
   x = 99,902.02