Finding the Third Proportional to 667.71 and 1,426.55

Step by Step Solution

1. Step 1: Write the proportion equation
   667.71 : 1,426.55 = 1,426.55 : x
2. Step 2: Convert to fraction form
   667.71/1,426.55 = 1,426.55/x
3. Step 3: Cross multiply
   667.71x = 1,426.55 × 1,426.55
4. Step 4: Simplify right side
   667.71x = 2,035,035.99
5. Step 5: Solve for x
   x = 2,035,035.99/667.71
6. Step 6: Final answer
   x = 3,047.78