Finding the Fourth Proportional to 9,890.51, 13,648.79 and 5,414.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.51 : 13,648.79 = 5,414.27 : x
2. Step 2: Convert to fraction form
   9,890.51/13,648.79 = 5,414.27/x
3. Step 3: Cross multiply
   9,890.51x = 13,648.79 × 5,414.27
4. Step 4: Simplify right side
   9,890.51x = 73,898,179.53
5. Step 5: Solve for x
   x = 73,898,179.53/9,890.51
6. Step 6: Final answer
   x = 7,471.63