Finding the Fourth Proportional to 9,890.59, 13,648.58 and 5,414.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.59 : 13,648.58 = 5,414.43 : x
2. Step 2: Convert to fraction form
   9,890.59/13,648.58 = 5,414.43/x
3. Step 3: Cross multiply
   9,890.59x = 13,648.58 × 5,414.43
4. Step 4: Simplify right side
   9,890.59x = 73,899,253.94
5. Step 5: Solve for x
   x = 73,899,253.94/9,890.59
6. Step 6: Final answer
   x = 7,471.67