Finding the Third Proportional to 686,853 and 1,009,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   686,853 : 1,009,705.50 = 1,009,705.50 : x
2. Step 2: Convert to fraction form
   686,853/1,009,705.50 = 1,009,705.50/x
3. Step 3: Cross multiply
   686,853x = 1,009,705.50 × 1,009,705.50
4. Step 4: Simplify right side
   686,853x = 1,019,505,196,730.25
5. Step 5: Solve for x
   x = 1,019,505,196,730.25/686,853
6. Step 6: Final answer
   x = 1,484,313.52