Finding the Third Proportional to 688,300 and 1,036,615

Step by Step Solution

1. Step 1: Write the proportion equation
   688,300 : 1,036,615 = 1,036,615 : x
2. Step 2: Convert to fraction form
   688,300/1,036,615 = 1,036,615/x
3. Step 3: Cross multiply
   688,300x = 1,036,615 × 1,036,615
4. Step 4: Simplify right side
   688,300x = 1,074,570,658,225
5. Step 5: Solve for x
   x = 1,074,570,658,225/688,300
6. Step 6: Final answer
   x = 1,561,195.20