Finding the Third Proportional to 311,745 and 674,725.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,745 : 674,725.50 = 674,725.50 : x
2. Step 2: Convert to fraction form
   311,745/674,725.50 = 674,725.50/x
3. Step 3: Cross multiply
   311,745x = 674,725.50 × 674,725.50
4. Step 4: Simplify right side
   311,745x = 455,254,500,350.25
5. Step 5: Solve for x
   x = 455,254,500,350.25/311,745
6. Step 6: Final answer
   x = 1,460,342.59