Finding the Fourth Proportional to 9,887.48, 13,644.72 and 5,411.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,887.48 : 13,644.72 = 5,411.23 : x
2. Step 2: Convert to fraction form
   9,887.48/13,644.72 = 5,411.23/x
3. Step 3: Cross multiply
   9,887.48x = 13,644.72 × 5,411.23
4. Step 4: Simplify right side
   9,887.48x = 73,834,691.15
5. Step 5: Solve for x
   x = 73,834,691.15/9,887.48
6. Step 6: Final answer
   x = 7,467.50