Finding the Fourth Proportional to 9,139.53, 13,710.72 and 3,874.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.53 : 13,710.72 = 3,874.56 : x
2. Step 2: Convert to fraction form
   9,139.53/13,710.72 = 3,874.56/x
3. Step 3: Cross multiply
   9,139.53x = 13,710.72 × 3,874.56
4. Step 4: Simplify right side
   9,139.53x = 53,123,007.28
5. Step 5: Solve for x
   x = 53,123,007.28/9,139.53
6. Step 6: Final answer
   x = 5,812.44