Finding the Third Proportional to 667,990 and 1,359,312

Step by Step Solution

1. Step 1: Write the proportion equation
   667,990 : 1,359,312 = 1,359,312 : x
2. Step 2: Convert to fraction form
   667,990/1,359,312 = 1,359,312/x
3. Step 3: Cross multiply
   667,990x = 1,359,312 × 1,359,312
4. Step 4: Simplify right side
   667,990x = 1,847,729,113,344
5. Step 5: Solve for x
   x = 1,847,729,113,344/667,990
6. Step 6: Final answer
   x = 2,766,102.96