Finding the Third Proportional to 1,311.25 and 2,838.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311.25 : 2,838.50 = 2,838.50 : x
2. Step 2: Convert to fraction form
   1,311.25/2,838.50 = 2,838.50/x
3. Step 3: Cross multiply
   1,311.25x = 2,838.50 × 2,838.50
4. Step 4: Simplify right side
   1,311.25x = 8,057,082.25
5. Step 5: Solve for x
   x = 8,057,082.25/1,311.25
6. Step 6: Final answer
   x = 6,144.58