Finding the Fourth Proportional to 31,068.04, 42,874.38 and 16,920.87

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.04 : 42,874.38 = 16,920.87 : x
2. Step 2: Convert to fraction form
   31,068.04/42,874.38 = 16,920.87/x
3. Step 3: Cross multiply
   31,068.04x = 42,874.38 × 16,920.87
4. Step 4: Simplify right side
   31,068.04x = 725,471,810.31
5. Step 5: Solve for x
   x = 725,471,810.31/31,068.04
6. Step 6: Final answer
   x = 23,351.06