Finding the Third Proportional to 359,917.50 and 787,631.25

Step by Step Solution

1. Step 1: Write the proportion equation
   359,917.50 : 787,631.25 = 787,631.25 : x
2. Step 2: Convert to fraction form
   359,917.50/787,631.25 = 787,631.25/x
3. Step 3: Cross multiply
   359,917.50x = 787,631.25 × 787,631.25
4. Step 4: Simplify right side
   359,917.50x = 620,362,985,976.56
5. Step 5: Solve for x
   x = 620,362,985,976.56/359,917.50
6. Step 6: Final answer
   x = 1,723,625.51