Finding the Fourth Proportional to 126,041.34, 173,929.23 and 72,330.78

Step by Step Solution

1. Step 1: Write the proportion equation
   126,041.34 : 173,929.23 = 72,330.78 : x
2. Step 2: Convert to fraction form
   126,041.34/173,929.23 = 72,330.78/x
3. Step 3: Cross multiply
   126,041.34x = 173,929.23 × 72,330.78
4. Step 4: Simplify right side
   126,041.34x = 12,580,436,870.70
5. Step 5: Solve for x
   x = 12,580,436,870.70/126,041.34
6. Step 6: Final answer
   x = 99,811.99