Finding the Third Proportional to 359,919.75 and 787,636.50

Step by Step Solution

1. Step 1: Write the proportion equation
   359,919.75 : 787,636.50 = 787,636.50 : x
2. Step 2: Convert to fraction form
   359,919.75/787,636.50 = 787,636.50/x
3. Step 3: Cross multiply
   359,919.75x = 787,636.50 × 787,636.50
4. Step 4: Simplify right side
   359,919.75x = 620,371,256,132.25
5. Step 5: Solve for x
   x = 620,371,256,132.25/359,919.75
6. Step 6: Final answer
   x = 1,723,637.72