Finding the Third Proportional to 1,288,428 and 2,910,920

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288,428 : 2,910,920 = 2,910,920 : x
2. Step 2: Convert to fraction form
   1,288,428/2,910,920 = 2,910,920/x
3. Step 3: Cross multiply
   1,288,428x = 2,910,920 × 2,910,920
4. Step 4: Simplify right side
   1,288,428x = 8,473,455,246,400
5. Step 5: Solve for x
   x = 8,473,455,246,400/1,288,428
6. Step 6: Final answer
   x = 6,576,584.21