Finding the Third Proportional to 478,140 and 1,040,396

Step by Step Solution

1. Step 1: Write the proportion equation
   478,140 : 1,040,396 = 1,040,396 : x
2. Step 2: Convert to fraction form
   478,140/1,040,396 = 1,040,396/x
3. Step 3: Cross multiply
   478,140x = 1,040,396 × 1,040,396
4. Step 4: Simplify right side
   478,140x = 1,082,423,836,816
5. Step 5: Solve for x
   x = 1,082,423,836,816/478,140
6. Step 6: Final answer
   x = 2,263,821.97