Finding the Fourth Proportional to 31,090.56, 42,903.61 and 17,661.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,090.56 : 42,903.61 = 17,661.76 : x
2. Step 2: Convert to fraction form
   31,090.56/42,903.61 = 17,661.76/x
3. Step 3: Cross multiply
   31,090.56x = 42,903.61 × 17,661.76
4. Step 4: Simplify right side
   31,090.56x = 757,753,262.95
5. Step 5: Solve for x
   x = 757,753,262.95/31,090.56
6. Step 6: Final answer
   x = 24,372.45