Finding the Fourth Proportional to 9,887.58, 13,644.86 and 5,411.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,887.58 : 13,644.86 = 5,411.33 : x
2. Step 2: Convert to fraction form
   9,887.58/13,644.86 = 5,411.33/x
3. Step 3: Cross multiply
   9,887.58x = 13,644.86 × 5,411.33
4. Step 4: Simplify right side
   9,887.58x = 73,836,772.04
5. Step 5: Solve for x
   x = 73,836,772.04/9,887.58
6. Step 6: Final answer
   x = 7,467.63