Finding the Third Proportional to 548,353.50 and 817,962

Step by Step Solution

1. Step 1: Write the proportion equation
   548,353.50 : 817,962 = 817,962 : x
2. Step 2: Convert to fraction form
   548,353.50/817,962 = 817,962/x
3. Step 3: Cross multiply
   548,353.50x = 817,962 × 817,962
4. Step 4: Simplify right side
   548,353.50x = 669,061,833,444
5. Step 5: Solve for x
   x = 669,061,833,444/548,353.50
6. Step 6: Final answer
   x = 1,220,128.68