Finding the Third Proportional to 688,578 and 1,491,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   688,578 : 1,491,499.50 = 1,491,499.50 : x
2. Step 2: Convert to fraction form
   688,578/1,491,499.50 = 1,491,499.50/x
3. Step 3: Cross multiply
   688,578x = 1,491,499.50 × 1,491,499.50
4. Step 4: Simplify right side
   688,578x = 2,224,570,758,500.25
5. Step 5: Solve for x
   x = 2,224,570,758,500.25/688,578
6. Step 6: Final answer
   x = 3,230,673.59