Finding the Fourth Proportional to 12,433.96, 17,158.98 and 7,128.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,433.96 : 17,158.98 = 7,128.52 : x
2. Step 2: Convert to fraction form
   12,433.96/17,158.98 = 7,128.52/x
3. Step 3: Cross multiply
   12,433.96x = 17,158.98 × 7,128.52
4. Step 4: Simplify right side
   12,433.96x = 122,318,132.11
5. Step 5: Solve for x
   x = 122,318,132.11/12,433.96
6. Step 6: Final answer
   x = 9,837.42