Finding the Third Proportional to 686,233.69 and 1,061,608.78

Step by Step Solution

1. Step 1: Write the proportion equation
   686,233.69 : 1,061,608.78 = 1,061,608.78 : x
2. Step 2: Convert to fraction form
   686,233.69/1,061,608.78 = 1,061,608.78/x
3. Step 3: Cross multiply
   686,233.69x = 1,061,608.78 × 1,061,608.78
4. Step 4: Simplify right side
   686,233.69x = 1,127,013,204,427.11
5. Step 5: Solve for x
   x = 1,127,013,204,427.11/686,233.69
6. Step 6: Final answer
   x = 1,642,316.93