Finding the Fourth Proportional to 31,112.56, 42,935.16 and 16,965.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,112.56 : 42,935.16 = 16,965.10 : x
2. Step 2: Convert to fraction form
   31,112.56/42,935.16 = 16,965.10/x
3. Step 3: Cross multiply
   31,112.56x = 42,935.16 × 16,965.10
4. Step 4: Simplify right side
   31,112.56x = 728,399,282.92
5. Step 5: Solve for x
   x = 728,399,282.92/31,112.56
6. Step 6: Final answer
   x = 23,411.74