Finding the Fourth Proportional to 31,037.07, 42,832.05 and 16,890.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,037.07 : 42,832.05 = 16,890.81 : x
2. Step 2: Convert to fraction form
   31,037.07/42,832.05 = 16,890.81/x
3. Step 3: Cross multiply
   31,037.07x = 42,832.05 × 16,890.81
4. Step 4: Simplify right side
   31,037.07x = 723,468,018.46
5. Step 5: Solve for x
   x = 723,468,018.46/31,037.07
6. Step 6: Final answer
   x = 23,309.80