Finding the Third Proportional to 688,670 and 1,499,320

Step by Step Solution

1. Step 1: Write the proportion equation
   688,670 : 1,499,320 = 1,499,320 : x
2. Step 2: Convert to fraction form
   688,670/1,499,320 = 1,499,320/x
3. Step 3: Cross multiply
   688,670x = 1,499,320 × 1,499,320
4. Step 4: Simplify right side
   688,670x = 2,247,960,462,400
5. Step 5: Solve for x
   x = 2,247,960,462,400/688,670
6. Step 6: Final answer
   x = 3,264,205.59