Finding the Fourth Proportional to 31,598.78, 47,407.04 and 13,831.00

Step by Step Solution

1. Step 1: Write the proportion equation
   31,598.78 : 47,407.04 = 13,831.00 : x
2. Step 2: Convert to fraction form
   31,598.78/47,407.04 = 13,831.00/x
3. Step 3: Cross multiply
   31,598.78x = 47,407.04 × 13,831.00
4. Step 4: Simplify right side
   31,598.78x = 655,686,464.05
5. Step 5: Solve for x
   x = 655,686,464.05/31,598.78
6. Step 6: Final answer
   x = 20,750.37