Finding the Third Proportional to 1,034,716 and 1,390,478

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034,716 : 1,390,478 = 1,390,478 : x
2. Step 2: Convert to fraction form
   1,034,716/1,390,478 = 1,390,478/x
3. Step 3: Cross multiply
   1,034,716x = 1,390,478 × 1,390,478
4. Step 4: Simplify right side
   1,034,716x = 1,933,429,068,484
5. Step 5: Solve for x
   x = 1,933,429,068,484/1,034,716
6. Step 6: Final answer
   x = 1,868,560.13