Finding the Third Proportional to 639,814 and 1,400,154

Step by Step Solution

1. Step 1: Write the proportion equation
   639,814 : 1,400,154 = 1,400,154 : x
2. Step 2: Convert to fraction form
   639,814/1,400,154 = 1,400,154/x
3. Step 3: Cross multiply
   639,814x = 1,400,154 × 1,400,154
4. Step 4: Simplify right side
   639,814x = 1,960,431,223,716
5. Step 5: Solve for x
   x = 1,960,431,223,716/639,814
6. Step 6: Final answer
   x = 3,064,064.28