Finding the Third Proportional to 359,916 and 787,630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   359,916 : 787,630.50 = 787,630.50 : x
2. Step 2: Convert to fraction form
   359,916/787,630.50 = 787,630.50/x
3. Step 3: Cross multiply
   359,916x = 787,630.50 × 787,630.50
4. Step 4: Simplify right side
   359,916x = 620,361,804,530.25
5. Step 5: Solve for x
   x = 620,361,804,530.25/359,916
6. Step 6: Final answer
   x = 1,723,629.42