Finding the Fourth Proportional to 9,887.67, 13,644.98 and 5,411.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,887.67 : 13,644.98 = 5,411.42 : x
2. Step 2: Convert to fraction form
   9,887.67/13,644.98 = 5,411.42/x
3. Step 3: Cross multiply
   9,887.67x = 13,644.98 × 5,411.42
4. Step 4: Simplify right side
   9,887.67x = 73,838,622.39
5. Step 5: Solve for x
   x = 73,838,622.39/9,887.67
6. Step 6: Final answer
   x = 7,467.75