Finding the Third Proportional to 308,551.50 and 674,775

Step by Step Solution

1. Step 1: Write the proportion equation
   308,551.50 : 674,775 = 674,775 : x
2. Step 2: Convert to fraction form
   308,551.50/674,775 = 674,775/x
3. Step 3: Cross multiply
   308,551.50x = 674,775 × 674,775
4. Step 4: Simplify right side
   308,551.50x = 455,321,300,625
5. Step 5: Solve for x
   x = 455,321,300,625/308,551.50
6. Step 6: Final answer
   x = 1,475,673.59