Finding the Fourth Proportional to 9,499.20, 13,108.64 and 5,307.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,499.20 : 13,108.64 = 5,307.20 : x
2. Step 2: Convert to fraction form
   9,499.20/13,108.64 = 5,307.20/x
3. Step 3: Cross multiply
   9,499.20x = 13,108.64 × 5,307.20
4. Step 4: Simplify right side
   9,499.20x = 69,570,174.21
5. Step 5: Solve for x
   x = 69,570,174.21/9,499.20
6. Step 6: Final answer
   x = 7,323.79