Finding the Third Proportional to 478,142 and 1,040,400

Step by Step Solution

1. Step 1: Write the proportion equation
   478,142 : 1,040,400 = 1,040,400 : x
2. Step 2: Convert to fraction form
   478,142/1,040,400 = 1,040,400/x
3. Step 3: Cross multiply
   478,142x = 1,040,400 × 1,040,400
4. Step 4: Simplify right side
   478,142x = 1,082,432,160,000
5. Step 5: Solve for x
   x = 1,082,432,160,000/478,142
6. Step 6: Final answer
   x = 2,263,829.91