Finding the Fourth Proportional to 31,638.48, 43,659.48 and 17,490.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,638.48 : 43,659.48 = 17,490.42 : x
2. Step 2: Convert to fraction form
   31,638.48/43,659.48 = 17,490.42/x
3. Step 3: Cross multiply
   31,638.48x = 43,659.48 × 17,490.42
4. Step 4: Simplify right side
   31,638.48x = 763,622,642.18
5. Step 5: Solve for x
   x = 763,622,642.18/31,638.48
6. Step 6: Final answer
   x = 24,135.88