Finding the Fourth Proportional to 31,026.34, 42,816.45 and 16,879.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,026.34 : 42,816.45 = 16,879.18 : x
2. Step 2: Convert to fraction form
   31,026.34/42,816.45 = 16,879.18/x
3. Step 3: Cross multiply
   31,026.34x = 42,816.45 × 16,879.18
4. Step 4: Simplify right side
   31,026.34x = 722,706,566.51
5. Step 5: Solve for x
   x = 722,706,566.51/31,026.34
6. Step 6: Final answer
   x = 23,293.32