Finding the Fourth Proportional to 9,868.88, 13,620 and 5,393.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,868.88 : 13,620 = 5,393.31 : x
2. Step 2: Convert to fraction form
   9,868.88/13,620 = 5,393.31/x
3. Step 3: Cross multiply
   9,868.88x = 13,620 × 5,393.31
4. Step 4: Simplify right side
   9,868.88x = 73,456,882.20
5. Step 5: Solve for x
   x = 73,456,882.20/9,868.88
6. Step 6: Final answer
   x = 7,443.28