Finding the Fourth Proportional to 31,665.61, 43,698.80 and 17,519.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,665.61 : 43,698.80 = 17,519.37 : x
2. Step 2: Convert to fraction form
   31,665.61/43,698.80 = 17,519.37/x
3. Step 3: Cross multiply
   31,665.61x = 43,698.80 × 17,519.37
4. Step 4: Simplify right side
   31,665.61x = 765,575,445.76
5. Step 5: Solve for x
   x = 765,575,445.76/31,665.61
6. Step 6: Final answer
   x = 24,176.87