Finding the Fourth Proportional to 12,424.52, 17,146.23 and 7,121

Step by Step Solution

1. Step 1: Write the proportion equation
   12,424.52 : 17,146.23 = 7,121 : x
2. Step 2: Convert to fraction form
   12,424.52/17,146.23 = 7,121/x
3. Step 3: Cross multiply
   12,424.52x = 17,146.23 × 7,121
4. Step 4: Simplify right side
   12,424.52x = 122,098,303.83
5. Step 5: Solve for x
   x = 122,098,303.83/12,424.52
6. Step 6: Final answer
   x = 9,827.20