Finding the Fourth Proportional to 9,108.72, 13,655.16 and 4,422.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,108.72 : 13,655.16 = 4,422.15 : x
2. Step 2: Convert to fraction form
   9,108.72/13,655.16 = 4,422.15/x
3. Step 3: Cross multiply
   9,108.72x = 13,655.16 × 4,422.15
4. Step 4: Simplify right side
   9,108.72x = 60,385,165.79
5. Step 5: Solve for x
   x = 60,385,165.79/9,108.72
6. Step 6: Final answer
   x = 6,629.38