Finding the Fourth Proportional to 31,648.65, 43,675.06 and 18,215

Step by Step Solution

1. Step 1: Write the proportion equation
   31,648.65 : 43,675.06 = 18,215 : x
2. Step 2: Convert to fraction form
   31,648.65/43,675.06 = 18,215/x
3. Step 3: Cross multiply
   31,648.65x = 43,675.06 × 18,215
4. Step 4: Simplify right side
   31,648.65x = 795,541,217.90
5. Step 5: Solve for x
   x = 795,541,217.90/31,648.65
6. Step 6: Final answer
   x = 25,136.66