Finding the Fourth Proportional to 81,003.34, 121,499.61 and 38,913.58

Step by Step Solution

1. Step 1: Write the proportion equation
   81,003.34 : 121,499.61 = 38,913.58 : x
2. Step 2: Convert to fraction form
   81,003.34/121,499.61 = 38,913.58/x
3. Step 3: Cross multiply
   81,003.34x = 121,499.61 × 38,913.58
4. Step 4: Simplify right side
   81,003.34x = 4,727,984,793.70
5. Step 5: Solve for x
   x = 4,727,984,793.70/81,003.34
6. Step 6: Final answer
   x = 58,367.78