Finding the Fourth Proportional to 9,715.33, 14,569.34 and 3,139.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,715.33 : 14,569.34 = 3,139.75 : x
2. Step 2: Convert to fraction form
   9,715.33/14,569.34 = 3,139.75/x
3. Step 3: Cross multiply
   9,715.33x = 14,569.34 × 3,139.75
4. Step 4: Simplify right side
   9,715.33x = 45,744,087.78
5. Step 5: Solve for x
   x = 45,744,087.78/9,715.33
6. Step 6: Final answer
   x = 4,708.44