Finding the Third Proportional to 642,340 and 1,399,068

Step by Step Solution

1. Step 1: Write the proportion equation
   642,340 : 1,399,068 = 1,399,068 : x
2. Step 2: Convert to fraction form
   642,340/1,399,068 = 1,399,068/x
3. Step 3: Cross multiply
   642,340x = 1,399,068 × 1,399,068
4. Step 4: Simplify right side
   642,340x = 1,957,391,268,624
5. Step 5: Solve for x
   x = 1,957,391,268,624/642,340
6. Step 6: Final answer
   x = 3,047,282.23