Finding the Third Proportional to 548,320.50 and 817,916

Step by Step Solution

1. Step 1: Write the proportion equation
   548,320.50 : 817,916 = 817,916 : x
2. Step 2: Convert to fraction form
   548,320.50/817,916 = 817,916/x
3. Step 3: Cross multiply
   548,320.50x = 817,916 × 817,916
4. Step 4: Simplify right side
   548,320.50x = 668,986,583,056
5. Step 5: Solve for x
   x = 668,986,583,056/548,320.50
6. Step 6: Final answer
   x = 1,220,064.88