Finding the Fourth Proportional to 12,831.56, 17,707.22 and 7,242.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,831.56 : 17,707.22 = 7,242.52 : x
2. Step 2: Convert to fraction form
   12,831.56/17,707.22 = 7,242.52/x
3. Step 3: Cross multiply
   12,831.56x = 17,707.22 × 7,242.52
4. Step 4: Simplify right side
   12,831.56x = 128,244,894.99
5. Step 5: Solve for x
   x = 128,244,894.99/12,831.56
6. Step 6: Final answer
   x = 9,994.49