Finding the Fourth Proportional to 9,499.24, 13,112.55 and 7,148.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,499.24 : 13,112.55 = 7,148.20 : x
2. Step 2: Convert to fraction form
   9,499.24/13,112.55 = 7,148.20/x
3. Step 3: Cross multiply
   9,499.24x = 13,112.55 × 7,148.20
4. Step 4: Simplify right side
   9,499.24x = 93,731,129.91
5. Step 5: Solve for x
   x = 93,731,129.91/9,499.24
6. Step 6: Final answer
   x = 9,867.22