Finding the Third Proportional to 663,585.75 and 998,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   663,585.75 : 998,662.50 = 998,662.50 : x
2. Step 2: Convert to fraction form
   663,585.75/998,662.50 = 998,662.50/x
3. Step 3: Cross multiply
   663,585.75x = 998,662.50 × 998,662.50
4. Step 4: Simplify right side
   663,585.75x = 997,326,788,906.25
5. Step 5: Solve for x
   x = 997,326,788,906.25/663,585.75
6. Step 6: Final answer
   x = 1,502,935.81