Finding the Third Proportional to 688,620 and 1,491,588

Step by Step Solution

1. Step 1: Write the proportion equation
   688,620 : 1,491,588 = 1,491,588 : x
2. Step 2: Convert to fraction form
   688,620/1,491,588 = 1,491,588/x
3. Step 3: Cross multiply
   688,620x = 1,491,588 × 1,491,588
4. Step 4: Simplify right side
   688,620x = 2,224,834,761,744
5. Step 5: Solve for x
   x = 2,224,834,761,744/688,620
6. Step 6: Final answer
   x = 3,230,859.93