Finding the Fourth Proportional to 12,490.59, 17,234.94 and 7,456.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,490.59 : 17,234.94 = 7,456.85 : x
2. Step 2: Convert to fraction form
   12,490.59/17,234.94 = 7,456.85/x
3. Step 3: Cross multiply
   12,490.59x = 17,234.94 × 7,456.85
4. Step 4: Simplify right side
   12,490.59x = 128,518,362.34
5. Step 5: Solve for x
   x = 128,518,362.34/12,490.59
6. Step 6: Final answer
   x = 10,289.21