Finding the Fourth Proportional to 9,381.43, 14,069.31 and 3,139.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,381.43 : 14,069.31 = 3,139.98 : x
2. Step 2: Convert to fraction form
   9,381.43/14,069.31 = 3,139.98/x
3. Step 3: Cross multiply
   9,381.43x = 14,069.31 × 3,139.98
4. Step 4: Simplify right side
   9,381.43x = 44,177,352.01
5. Step 5: Solve for x
   x = 44,177,352.01/9,381.43
6. Step 6: Final answer
   x = 4,709.02