Finding the Third Proportional to 318,081 and 693,319.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,081 : 693,319.50 = 693,319.50 : x
2. Step 2: Convert to fraction form
   318,081/693,319.50 = 693,319.50/x
3. Step 3: Cross multiply
   318,081x = 693,319.50 × 693,319.50
4. Step 4: Simplify right side
   318,081x = 480,691,929,080.25
5. Step 5: Solve for x
   x = 480,691,929,080.25/318,081
6. Step 6: Final answer
   x = 1,511,224.91