Finding the Fourth Proportional to 9,890.34, 13,648.68 and 5,414.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.34 : 13,648.68 = 5,414.28 : x
2. Step 2: Convert to fraction form
   9,890.34/13,648.68 = 5,414.28/x
3. Step 3: Cross multiply
   9,890.34x = 13,648.68 × 5,414.28
4. Step 4: Simplify right side
   9,890.34x = 73,897,775.15
5. Step 5: Solve for x
   x = 73,897,775.15/9,890.34
6. Step 6: Final answer
   x = 7,471.71