Finding the Third Proportional to 824,400 and 1,311,401.25

Step by Step Solution

1. Step 1: Write the proportion equation
   824,400 : 1,311,401.25 = 1,311,401.25 : x
2. Step 2: Convert to fraction form
   824,400/1,311,401.25 = 1,311,401.25/x
3. Step 3: Cross multiply
   824,400x = 1,311,401.25 × 1,311,401.25
4. Step 4: Simplify right side
   824,400x = 1,719,773,238,501.56
5. Step 5: Solve for x
   x = 1,719,773,238,501.56/824,400
6. Step 6: Final answer
   x = 2,086,090.78