Finding the Third Proportional to 682,588.50 and 918,900

Step by Step Solution

1. Step 1: Write the proportion equation
   682,588.50 : 918,900 = 918,900 : x
2. Step 2: Convert to fraction form
   682,588.50/918,900 = 918,900/x
3. Step 3: Cross multiply
   682,588.50x = 918,900 × 918,900
4. Step 4: Simplify right side
   682,588.50x = 844,377,210,000
5. Step 5: Solve for x
   x = 844,377,210,000/682,588.50
6. Step 6: Final answer
   x = 1,237,022.32