Finding the Third Proportional to 1,378,428 and 2,920,512

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378,428 : 2,920,512 = 2,920,512 : x
2. Step 2: Convert to fraction form
   1,378,428/2,920,512 = 2,920,512/x
3. Step 3: Cross multiply
   1,378,428x = 2,920,512 × 2,920,512
4. Step 4: Simplify right side
   1,378,428x = 8,529,390,342,144
5. Step 5: Solve for x
   x = 8,529,390,342,144/1,378,428
6. Step 6: Final answer
   x = 6,187,766.31