Finding the Fourth Proportional to 9,887.33, 13,644.51 and 5,411.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,887.33 : 13,644.51 = 5,411.07 : x
2. Step 2: Convert to fraction form
   9,887.33/13,644.51 = 5,411.07/x
3. Step 3: Cross multiply
   9,887.33x = 13,644.51 × 5,411.07
4. Step 4: Simplify right side
   9,887.33x = 73,831,470.18
5. Step 5: Solve for x
   x = 73,831,470.18/9,887.33
6. Step 6: Final answer
   x = 7,467.28