Finding the Fourth Proportional to 31,066.82, 42,870.92 and 17,638.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,066.82 : 42,870.92 = 17,638.81 : x
2. Step 2: Convert to fraction form
   31,066.82/42,870.92 = 17,638.81/x
3. Step 3: Cross multiply
   31,066.82x = 42,870.92 × 17,638.81
4. Step 4: Simplify right side
   31,066.82x = 756,192,157.40
5. Step 5: Solve for x
   x = 756,192,157.40/31,066.82
6. Step 6: Final answer
   x = 24,340.83