Finding the Fourth Proportional to 9,642.72, 13,307.04 and 5,663.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,642.72 : 13,307.04 = 5,663.04 : x
2. Step 2: Convert to fraction form
   9,642.72/13,307.04 = 5,663.04/x
3. Step 3: Cross multiply
   9,642.72x = 13,307.04 × 5,663.04
4. Step 4: Simplify right side
   9,642.72x = 75,358,299.80
5. Step 5: Solve for x
   x = 75,358,299.80/9,642.72
6. Step 6: Final answer
   x = 7,815.05