Finding the Fourth Proportional to 9,781.57, 14,672.20 and 3,938.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,781.57 : 14,672.20 = 3,938.04 : x
2. Step 2: Convert to fraction form
   9,781.57/14,672.20 = 3,938.04/x
3. Step 3: Cross multiply
   9,781.57x = 14,672.20 × 3,938.04
4. Step 4: Simplify right side
   9,781.57x = 57,779,710.49
5. Step 5: Solve for x
   x = 57,779,710.49/9,781.57
6. Step 6: Final answer
   x = 5,907.00