Finding the Third Proportional to 773.50 and 1,385

Step by Step Solution

1. Step 1: Write the proportion equation
   773.50 : 1,385 = 1,385 : x
2. Step 2: Convert to fraction form
   773.50/1,385 = 1,385/x
3. Step 3: Cross multiply
   773.50x = 1,385 × 1,385
4. Step 4: Simplify right side
   773.50x = 1,918,225
5. Step 5: Solve for x
   x = 1,918,225/773.50
6. Step 6: Final answer
   x = 2,479.93