Finding the Third Proportional to 318,361.50 and 693,585

Step by Step Solution

1. Step 1: Write the proportion equation
   318,361.50 : 693,585 = 693,585 : x
2. Step 2: Convert to fraction form
   318,361.50/693,585 = 693,585/x
3. Step 3: Cross multiply
   318,361.50x = 693,585 × 693,585
4. Step 4: Simplify right side
   318,361.50x = 481,060,152,225
5. Step 5: Solve for x
   x = 481,060,152,225/318,361.50
6. Step 6: Final answer
   x = 1,511,050.02