Finding the Fourth Proportional to 9,890.57, 13,648.37 and 5,414.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.57 : 13,648.37 = 5,414.31 : x
2. Step 2: Convert to fraction form
   9,890.57/13,648.37 = 5,414.31/x
3. Step 3: Cross multiply
   9,890.57x = 13,648.37 × 5,414.31
4. Step 4: Simplify right side
   9,890.57x = 73,896,479.10
5. Step 5: Solve for x
   x = 73,896,479.10/9,890.57
6. Step 6: Final answer
   x = 7,471.41