Finding the Fourth Proportional to 31,037.51, 42,831.49 and 16,890.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,037.51 : 42,831.49 = 16,890.37 : x
2. Step 2: Convert to fraction form
   31,037.51/42,831.49 = 16,890.37/x
3. Step 3: Cross multiply
   31,037.51x = 42,831.49 × 16,890.37
4. Step 4: Simplify right side
   31,037.51x = 723,439,713.75
5. Step 5: Solve for x
   x = 723,439,713.75/31,037.51
6. Step 6: Final answer
   x = 23,308.56