Finding the Fourth Proportional to 31,118.41, 42,943.12 and 16,971.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.41 : 42,943.12 = 16,971.31 : x
2. Step 2: Convert to fraction form
   31,118.41/42,943.12 = 16,971.31/x
3. Step 3: Cross multiply
   31,118.41x = 42,943.12 × 16,971.31
4. Step 4: Simplify right side
   31,118.41x = 728,801,001.89
5. Step 5: Solve for x
   x = 728,801,001.89/31,118.41
6. Step 6: Final answer
   x = 23,420.25