Finding the Third Proportional to 550,404 and 842,015.25

Step by Step Solution

1. Step 1: Write the proportion equation
   550,404 : 842,015.25 = 842,015.25 : x
2. Step 2: Convert to fraction form
   550,404/842,015.25 = 842,015.25/x
3. Step 3: Cross multiply
   550,404x = 842,015.25 × 842,015.25
4. Step 4: Simplify right side
   550,404x = 708,989,681,232.56
5. Step 5: Solve for x
   x = 708,989,681,232.56/550,404
6. Step 6: Final answer
   x = 1,288,125.96