Finding the Third Proportional to 3,618.50 and 7,931.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,618.50 : 7,931.25 = 7,931.25 : x
2. Step 2: Convert to fraction form
   3,618.50/7,931.25 = 7,931.25/x
3. Step 3: Cross multiply
   3,618.50x = 7,931.25 × 7,931.25
4. Step 4: Simplify right side
   3,618.50x = 62,904,726.56
5. Step 5: Solve for x
   x = 62,904,726.56/3,618.50
6. Step 6: Final answer
   x = 17,384.20