Finding the Third Proportional to 686,863.75 and 1,009,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   686,863.75 : 1,009,715.50 = 1,009,715.50 : x
2. Step 2: Convert to fraction form
   686,863.75/1,009,715.50 = 1,009,715.50/x
3. Step 3: Cross multiply
   686,863.75x = 1,009,715.50 × 1,009,715.50
4. Step 4: Simplify right side
   686,863.75x = 1,019,525,390,940.25
5. Step 5: Solve for x
   x = 1,019,525,390,940.25/686,863.75
6. Step 6: Final answer
   x = 1,484,319.69