Finding the Third Proportional to 316,890 and 704,621.25

Step by Step Solution

1. Step 1: Write the proportion equation
   316,890 : 704,621.25 = 704,621.25 : x
2. Step 2: Convert to fraction form
   316,890/704,621.25 = 704,621.25/x
3. Step 3: Cross multiply
   316,890x = 704,621.25 × 704,621.25
4. Step 4: Simplify right side
   316,890x = 496,491,105,951.56
5. Step 5: Solve for x
   x = 496,491,105,951.56/316,890
6. Step 6: Final answer
   x = 1,566,761.67