Finding the Third Proportional to 677,429 and 1,039,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   677,429 : 1,039,567.50 = 1,039,567.50 : x
2. Step 2: Convert to fraction form
   677,429/1,039,567.50 = 1,039,567.50/x
3. Step 3: Cross multiply
   677,429x = 1,039,567.50 × 1,039,567.50
4. Step 4: Simplify right side
   677,429x = 1,080,700,587,056.25
5. Step 5: Solve for x
   x = 1,080,700,587,056.25/677,429
6. Step 6: Final answer
   x = 1,595,297.20