Finding the Third Proportional to 311,427 and 679,135.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,427 : 679,135.50 = 679,135.50 : x
2. Step 2: Convert to fraction form
   311,427/679,135.50 = 679,135.50/x
3. Step 3: Cross multiply
   311,427x = 679,135.50 × 679,135.50
4. Step 4: Simplify right side
   311,427x = 461,225,027,360.25
5. Step 5: Solve for x
   x = 461,225,027,360.25/311,427
6. Step 6: Final answer
   x = 1,481,005.27