Finding the Third Proportional to 687,103.50 and 1,069,918.50

Step by Step Solution

1. Step 1: Write the proportion equation
   687,103.50 : 1,069,918.50 = 1,069,918.50 : x
2. Step 2: Convert to fraction form
   687,103.50/1,069,918.50 = 1,069,918.50/x
3. Step 3: Cross multiply
   687,103.50x = 1,069,918.50 × 1,069,918.50
4. Step 4: Simplify right side
   687,103.50x = 1,144,725,596,642.25
5. Step 5: Solve for x
   x = 1,144,725,596,642.25/687,103.50
6. Step 6: Final answer
   x = 1,666,016.25