Finding the Third Proportional to 678,264 and 1,432,128

Step by Step Solution

1. Step 1: Write the proportion equation
   678,264 : 1,432,128 = 1,432,128 : x
2. Step 2: Convert to fraction form
   678,264/1,432,128 = 1,432,128/x
3. Step 3: Cross multiply
   678,264x = 1,432,128 × 1,432,128
4. Step 4: Simplify right side
   678,264x = 2,050,990,608,384
5. Step 5: Solve for x
   x = 2,050,990,608,384/678,264
6. Step 6: Final answer
   x = 3,023,882.45