Finding the Fourth Proportional to 31,066.94, 42,872.01 and 17,638.58

Step by Step Solution

1. Step 1: Write the proportion equation
   31,066.94 : 42,872.01 = 17,638.58 : x
2. Step 2: Convert to fraction form
   31,066.94/42,872.01 = 17,638.58/x
3. Step 3: Cross multiply
   31,066.94x = 42,872.01 × 17,638.58
4. Step 4: Simplify right side
   31,066.94x = 756,201,378.15
5. Step 5: Solve for x
   x = 756,201,378.15/31,066.94
6. Step 6: Final answer
   x = 24,341.03