Finding the Third Proportional to 688,747.50 and 1,085,944.50

Step by Step Solution

1. Step 1: Write the proportion equation
   688,747.50 : 1,085,944.50 = 1,085,944.50 : x
2. Step 2: Convert to fraction form
   688,747.50/1,085,944.50 = 1,085,944.50/x
3. Step 3: Cross multiply
   688,747.50x = 1,085,944.50 × 1,085,944.50
4. Step 4: Simplify right side
   688,747.50x = 1,179,275,457,080.25
5. Step 5: Solve for x
   x = 1,179,275,457,080.25/688,747.50
6. Step 6: Final answer
   x = 1,712,202.89