Finding the Third Proportional to 642,249 and 1,000,140

Step by Step Solution

1. Step 1: Write the proportion equation
   642,249 : 1,000,140 = 1,000,140 : x
2. Step 2: Convert to fraction form
   642,249/1,000,140 = 1,000,140/x
3. Step 3: Cross multiply
   642,249x = 1,000,140 × 1,000,140
4. Step 4: Simplify right side
   642,249x = 1,000,280,019,600
5. Step 5: Solve for x
   x = 1,000,280,019,600/642,249
6. Step 6: Final answer
   x = 1,557,464.50