Finding the Fourth Proportional to 31,066.31, 42,872.21 and 17,636.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,066.31 : 42,872.21 = 17,636.31 : x
2. Step 2: Convert to fraction form
   31,066.31/42,872.21 = 17,636.31/x
3. Step 3: Cross multiply
   31,066.31x = 42,872.21 × 17,636.31
4. Step 4: Simplify right side
   31,066.31x = 756,107,585.95
5. Step 5: Solve for x
   x = 756,107,585.95/31,066.31
6. Step 6: Final answer
   x = 24,338.51