Finding the Fourth Proportional to 9,636.88, 13,299.98 and 5,445.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,636.88 : 13,299.98 = 5,445.40 : x
2. Step 2: Convert to fraction form
   9,636.88/13,299.98 = 5,445.40/x
3. Step 3: Cross multiply
   9,636.88x = 13,299.98 × 5,445.40
4. Step 4: Simplify right side
   9,636.88x = 72,423,711.09
5. Step 5: Solve for x
   x = 72,423,711.09/9,636.88
6. Step 6: Final answer
   x = 7,515.27