Finding the Fourth Proportional to 31,100.63, 42,918.87 and 17,671.89

Step by Step Solution

1. Step 1: Write the proportion equation
   31,100.63 : 42,918.87 = 17,671.89 : x
2. Step 2: Convert to fraction form
   31,100.63/42,918.87 = 17,671.89/x
3. Step 3: Cross multiply
   31,100.63x = 42,918.87 × 17,671.89
4. Step 4: Simplify right side
   31,100.63x = 758,457,776.78
5. Step 5: Solve for x
   x = 758,457,776.78/31,100.63
6. Step 6: Final answer
   x = 24,387.22