Finding the Fourth Proportional to 31,037.06, 42,831.16 and 16,890.01

Step by Step Solution

1. Step 1: Write the proportion equation
   31,037.06 : 42,831.16 = 16,890.01 : x
2. Step 2: Convert to fraction form
   31,037.06/42,831.16 = 16,890.01/x
3. Step 3: Cross multiply
   31,037.06x = 42,831.16 × 16,890.01
4. Step 4: Simplify right side
   31,037.06x = 723,418,571.41
5. Step 5: Solve for x
   x = 723,418,571.41/31,037.06
6. Step 6: Final answer
   x = 23,308.22