Finding the Fourth Proportional to 9,861.55, 14,789.76 and 3,938.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.55 : 14,789.76 = 3,938.20 : x
2. Step 2: Convert to fraction form
   9,861.55/14,789.76 = 3,938.20/x
3. Step 3: Cross multiply
   9,861.55x = 14,789.76 × 3,938.20
4. Step 4: Simplify right side
   9,861.55x = 58,245,032.83
5. Step 5: Solve for x
   x = 58,245,032.83/9,861.55
6. Step 6: Final answer
   x = 5,906.28