Finding the Fourth Proportional to 31,118.19, 42,943.01 and 16,971

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.19 : 42,943.01 = 16,971 : x
2. Step 2: Convert to fraction form
   31,118.19/42,943.01 = 16,971/x
3. Step 3: Cross multiply
   31,118.19x = 42,943.01 × 16,971
4. Step 4: Simplify right side
   31,118.19x = 728,785,737.86
5. Step 5: Solve for x
   x = 728,785,737.86/31,118.19
6. Step 6: Final answer
   x = 23,419.93