Finding the Fourth Proportional to 31,091.04, 42,905.60 and 16,943.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,091.04 : 42,905.60 = 16,943.88 : x
2. Step 2: Convert to fraction form
   31,091.04/42,905.60 = 16,943.88/x
3. Step 3: Cross multiply
   31,091.04x = 42,905.60 × 16,943.88
4. Step 4: Simplify right side
   31,091.04x = 726,987,337.73
5. Step 5: Solve for x
   x = 726,987,337.73/31,091.04
6. Step 6: Final answer
   x = 23,382.54