Finding the Third Proportional to 492,016.78 and 803,419.17

Step by Step Solution

1. Step 1: Write the proportion equation
   492,016.78 : 803,419.17 = 803,419.17 : x
2. Step 2: Convert to fraction form
   492,016.78/803,419.17 = 803,419.17/x
3. Step 3: Cross multiply
   492,016.78x = 803,419.17 × 803,419.17
4. Step 4: Simplify right side
   492,016.78x = 645,482,365,736.31
5. Step 5: Solve for x
   x = 645,482,365,736.31/492,016.78
6. Step 6: Final answer
   x = 1,311,911.28