Finding the Fourth Proportional to 22,831.56, 31,507.46 and 12,760

Step by Step Solution

1. Step 1: Write the proportion equation
   22,831.56 : 31,507.46 = 12,760 : x
2. Step 2: Convert to fraction form
   22,831.56/31,507.46 = 12,760/x
3. Step 3: Cross multiply
   22,831.56x = 31,507.46 × 12,760
4. Step 4: Simplify right side
   22,831.56x = 402,035,189.60
5. Step 5: Solve for x
   x = 402,035,189.60/22,831.56
6. Step 6: Final answer
   x = 17,608.75