Finding the Third Proportional to 642,908 and 1,400,110

Step by Step Solution

1. Step 1: Write the proportion equation
   642,908 : 1,400,110 = 1,400,110 : x
2. Step 2: Convert to fraction form
   642,908/1,400,110 = 1,400,110/x
3. Step 3: Cross multiply
   642,908x = 1,400,110 × 1,400,110
4. Step 4: Simplify right side
   642,908x = 1,960,308,012,100
5. Step 5: Solve for x
   x = 1,960,308,012,100/642,908
6. Step 6: Final answer
   x = 3,049,126.80