Finding the Third Proportional to 1,276.50 and 3,445.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.50 : 3,445.50 = 3,445.50 : x
2. Step 2: Convert to fraction form
   1,276.50/3,445.50 = 3,445.50/x
3. Step 3: Cross multiply
   1,276.50x = 3,445.50 × 3,445.50
4. Step 4: Simplify right side
   1,276.50x = 11,871,470.25
5. Step 5: Solve for x
   x = 11,871,470.25/1,276.50
6. Step 6: Final answer
   x = 9,300.02