Finding the Third Proportional to 578,499 and 1,245,900

Step by Step Solution

1. Step 1: Write the proportion equation
   578,499 : 1,245,900 = 1,245,900 : x
2. Step 2: Convert to fraction form
   578,499/1,245,900 = 1,245,900/x
3. Step 3: Cross multiply
   578,499x = 1,245,900 × 1,245,900
4. Step 4: Simplify right side
   578,499x = 1,552,266,810,000
5. Step 5: Solve for x
   x = 1,552,266,810,000/578,499
6. Step 6: Final answer
   x = 2,683,266.19