Finding the Fourth Proportional to 31,666.56, 43,699.20 and 17,518.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,666.56 : 43,699.20 = 17,518.56 : x
2. Step 2: Convert to fraction form
   31,666.56/43,699.20 = 17,518.56/x
3. Step 3: Cross multiply
   31,666.56x = 43,699.20 × 17,518.56
4. Step 4: Simplify right side
   31,666.56x = 765,547,057.15
5. Step 5: Solve for x
   x = 765,547,057.15/31,666.56
6. Step 6: Final answer
   x = 24,175.25