Finding the Fourth Proportional to 9,103.16, 12,562.52 and 5,518.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,103.16 : 12,562.52 = 5,518.20 : x
2. Step 2: Convert to fraction form
   9,103.16/12,562.52 = 5,518.20/x
3. Step 3: Cross multiply
   9,103.16x = 12,562.52 × 5,518.20
4. Step 4: Simplify right side
   9,103.16x = 69,322,497.86
5. Step 5: Solve for x
   x = 69,322,497.86/9,103.16
6. Step 6: Final answer
   x = 7,615.21