Finding the Fourth Proportional to 31,037.57, 42,832.74 and 16,891.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,037.57 : 42,832.74 = 16,891.31 : x
2. Step 2: Convert to fraction form
   31,037.57/42,832.74 = 16,891.31/x
3. Step 3: Cross multiply
   31,037.57x = 42,832.74 × 16,891.31
4. Step 4: Simplify right side
   31,037.57x = 723,501,089.49
5. Step 5: Solve for x
   x = 723,501,089.49/31,037.57
6. Step 6: Final answer
   x = 23,310.49