Finding the Third Proportional to 550,789.50 and 1,209,978

Step by Step Solution

1. Step 1: Write the proportion equation
   550,789.50 : 1,209,978 = 1,209,978 : x
2. Step 2: Convert to fraction form
   550,789.50/1,209,978 = 1,209,978/x
3. Step 3: Cross multiply
   550,789.50x = 1,209,978 × 1,209,978
4. Step 4: Simplify right side
   550,789.50x = 1,464,046,760,484
5. Step 5: Solve for x
   x = 1,464,046,760,484/550,789.50
6. Step 6: Final answer
   x = 2,658,087.64