Finding the Fourth Proportional to 12,400.72, 18,596.52 and 5,003.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,400.72 : 18,596.52 = 5,003.20 : x
2. Step 2: Convert to fraction form
   12,400.72/18,596.52 = 5,003.20/x
3. Step 3: Cross multiply
   12,400.72x = 18,596.52 × 5,003.20
4. Step 4: Simplify right side
   12,400.72x = 93,042,108.86
5. Step 5: Solve for x
   x = 93,042,108.86/12,400.72
6. Step 6: Final answer
   x = 7,502.96