Finding the Third Proportional to 311,425.50 and 679,134

Step by Step Solution

1. Step 1: Write the proportion equation
   311,425.50 : 679,134 = 679,134 : x
2. Step 2: Convert to fraction form
   311,425.50/679,134 = 679,134/x
3. Step 3: Cross multiply
   311,425.50x = 679,134 × 679,134
4. Step 4: Simplify right side
   311,425.50x = 461,222,989,956
5. Step 5: Solve for x
   x = 461,222,989,956/311,425.50
6. Step 6: Final answer
   x = 1,481,005.86