Finding the Third Proportional to 288,724.50 and 609,045

Step by Step Solution

1. Step 1: Write the proportion equation
   288,724.50 : 609,045 = 609,045 : x
2. Step 2: Convert to fraction form
   288,724.50/609,045 = 609,045/x
3. Step 3: Cross multiply
   288,724.50x = 609,045 × 609,045
4. Step 4: Simplify right side
   288,724.50x = 370,935,812,025
5. Step 5: Solve for x
   x = 370,935,812,025/288,724.50
6. Step 6: Final answer
   x = 1,284,739.65