Finding the Fourth Proportional to 31,080.65, 42,891.26 and 16,933.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,080.65 : 42,891.26 = 16,933.50 : x
2. Step 2: Convert to fraction form
   31,080.65/42,891.26 = 16,933.50/x
3. Step 3: Cross multiply
   31,080.65x = 42,891.26 × 16,933.50
4. Step 4: Simplify right side
   31,080.65x = 726,299,066.54
5. Step 5: Solve for x
   x = 726,299,066.54/31,080.65
6. Step 6: Final answer
   x = 23,368.21