Finding the Third Proportional to 311,401.13 and 680,967

Step by Step Solution

1. Step 1: Write the proportion equation
   311,401.13 : 680,967 = 680,967 : x
2. Step 2: Convert to fraction form
   311,401.13/680,967 = 680,967/x
3. Step 3: Cross multiply
   311,401.13x = 680,967 × 680,967
4. Step 4: Simplify right side
   311,401.13x = 463,716,055,089
5. Step 5: Solve for x
   x = 463,716,055,089/311,401.13
6. Step 6: Final answer
   x = 1,489,127.75