Finding the Fourth Proportional to 126,103.56, 174,030.34 and 72,388.68

Step by Step Solution

1. Step 1: Write the proportion equation
   126,103.56 : 174,030.34 = 72,388.68 : x
2. Step 2: Convert to fraction form
   126,103.56/174,030.34 = 72,388.68/x
3. Step 3: Cross multiply
   126,103.56x = 174,030.34 × 72,388.68
4. Step 4: Simplify right side
   126,103.56x = 12,597,826,592.55
5. Step 5: Solve for x
   x = 12,597,826,592.55/126,103.56
6. Step 6: Final answer
   x = 99,900.64