Finding the Fourth Proportional to 9,689.34, 13,370.85 and 5,382.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,689.34 : 13,370.85 = 5,382.15 : x
2. Step 2: Convert to fraction form
   9,689.34/13,370.85 = 5,382.15/x
3. Step 3: Cross multiply
   9,689.34x = 13,370.85 × 5,382.15
4. Step 4: Simplify right side
   9,689.34x = 71,963,920.33
5. Step 5: Solve for x
   x = 71,963,920.33/9,689.34
6. Step 6: Final answer
   x = 7,427.12