Finding the Third Proportional to 609,040 and 1,311,200

Step by Step Solution

1. Step 1: Write the proportion equation
   609,040 : 1,311,200 = 1,311,200 : x
2. Step 2: Convert to fraction form
   609,040/1,311,200 = 1,311,200/x
3. Step 3: Cross multiply
   609,040x = 1,311,200 × 1,311,200
4. Step 4: Simplify right side
   609,040x = 1,719,245,440,000
5. Step 5: Solve for x
   x = 1,719,245,440,000/609,040
6. Step 6: Final answer
   x = 2,822,877.71