Finding the Fourth Proportional to 12,433.86, 17,159.73 and 7,129.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,433.86 : 17,159.73 = 7,129.17 : x
2. Step 2: Convert to fraction form
   12,433.86/17,159.73 = 7,129.17/x
3. Step 3: Cross multiply
   12,433.86x = 17,159.73 × 7,129.17
4. Step 4: Simplify right side
   12,433.86x = 122,334,632.32
5. Step 5: Solve for x
   x = 122,334,632.32/12,433.86
6. Step 6: Final answer
   x = 9,838.83