Finding the Third Proportional to 642,912 and 1,400,118

Step by Step Solution

1. Step 1: Write the proportion equation
   642,912 : 1,400,118 = 1,400,118 : x
2. Step 2: Convert to fraction form
   642,912/1,400,118 = 1,400,118/x
3. Step 3: Cross multiply
   642,912x = 1,400,118 × 1,400,118
4. Step 4: Simplify right side
   642,912x = 1,960,330,413,924
5. Step 5: Solve for x
   x = 1,960,330,413,924/642,912
6. Step 6: Final answer
   x = 3,049,142.67