Finding the Fourth Proportional to 9,887.63, 13,644.59 and 5,411.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,887.63 : 13,644.59 = 5,411.30 : x
2. Step 2: Convert to fraction form
   9,887.63/13,644.59 = 5,411.30/x
3. Step 3: Cross multiply
   9,887.63x = 13,644.59 × 5,411.30
4. Step 4: Simplify right side
   9,887.63x = 73,834,874.59
5. Step 5: Solve for x
   x = 73,834,874.59/9,887.63
6. Step 6: Final answer
   x = 7,467.40