Finding the Third Proportional to 354,675 and 487,714.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,675 : 487,714.50 = 487,714.50 : x
2. Step 2: Convert to fraction form
   354,675/487,714.50 = 487,714.50/x
3. Step 3: Cross multiply
   354,675x = 487,714.50 × 487,714.50
4. Step 4: Simplify right side
   354,675x = 237,865,433,510.25
5. Step 5: Solve for x
   x = 237,865,433,510.25/354,675
6. Step 6: Final answer
   x = 670,657.46