Finding the Third Proportional to 57,631.50 and 62,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,631.50 : 62,815.50 = 62,815.50 : x
2. Step 2: Convert to fraction form
   57,631.50/62,815.50 = 62,815.50/x
3. Step 3: Cross multiply
   57,631.50x = 62,815.50 × 62,815.50
4. Step 4: Simplify right side
   57,631.50x = 3,945,787,040.25
5. Step 5: Solve for x
   x = 3,945,787,040.25/57,631.50
6. Step 6: Final answer
   x = 68,465.80