Finding the Third Proportional to 688,308 and 1,036,627

Step by Step Solution

1. Step 1: Write the proportion equation
   688,308 : 1,036,627 = 1,036,627 : x
2. Step 2: Convert to fraction form
   688,308/1,036,627 = 1,036,627/x
3. Step 3: Cross multiply
   688,308x = 1,036,627 × 1,036,627
4. Step 4: Simplify right side
   688,308x = 1,074,595,537,129
5. Step 5: Solve for x
   x = 1,074,595,537,129/688,308
6. Step 6: Final answer
   x = 1,561,213.20