Finding the Third Proportional to 2,805 and 3,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,805 : 3,931.50 = 3,931.50 : x
2. Step 2: Convert to fraction form
   2,805/3,931.50 = 3,931.50/x
3. Step 3: Cross multiply
   2,805x = 3,931.50 × 3,931.50
4. Step 4: Simplify right side
   2,805x = 15,456,692.25
5. Step 5: Solve for x
   x = 15,456,692.25/2,805
6. Step 6: Final answer
   x = 5,510.41