Finding the Third Proportional to 688,188 and 1,036,260

Step by Step Solution

1. Step 1: Write the proportion equation
   688,188 : 1,036,260 = 1,036,260 : x
2. Step 2: Convert to fraction form
   688,188/1,036,260 = 1,036,260/x
3. Step 3: Cross multiply
   688,188x = 1,036,260 × 1,036,260
4. Step 4: Simplify right side
   688,188x = 1,073,834,787,600
5. Step 5: Solve for x
   x = 1,073,834,787,600/688,188
6. Step 6: Final answer
   x = 1,560,379.99