Finding the Fourth Proportional to 31,091.28, 42,904.88 and 16,943.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,091.28 : 42,904.88 = 16,943.84 : x
2. Step 2: Convert to fraction form
   31,091.28/42,904.88 = 16,943.84/x
3. Step 3: Cross multiply
   31,091.28x = 42,904.88 × 16,943.84
4. Step 4: Simplify right side
   31,091.28x = 726,973,421.94
5. Step 5: Solve for x
   x = 726,973,421.94/31,091.28
6. Step 6: Final answer
   x = 23,381.91