Finding the Fourth Proportional to 12,200.24, 18,301.28 and 5,274.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.24 : 18,301.28 = 5,274.72 : x
2. Step 2: Convert to fraction form
   12,200.24/18,301.28 = 5,274.72/x
3. Step 3: Cross multiply
   12,200.24x = 18,301.28 × 5,274.72
4. Step 4: Simplify right side
   12,200.24x = 96,534,127.64
5. Step 5: Solve for x
   x = 96,534,127.64/12,200.24
6. Step 6: Final answer
   x = 7,912.48