Finding the Third Proportional to 578,280 and 1,253,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   578,280 : 1,253,089.50 = 1,253,089.50 : x
2. Step 2: Convert to fraction form
   578,280/1,253,089.50 = 1,253,089.50/x
3. Step 3: Cross multiply
   578,280x = 1,253,089.50 × 1,253,089.50
4. Step 4: Simplify right side
   578,280x = 1,570,233,295,010.25
5. Step 5: Solve for x
   x = 1,570,233,295,010.25/578,280
6. Step 6: Final answer
   x = 2,715,351.21