Finding the Third Proportional to 495,680 and 787,809.50

Step by Step Solution

1. Step 1: Write the proportion equation
   495,680 : 787,809.50 = 787,809.50 : x
2. Step 2: Convert to fraction form
   495,680/787,809.50 = 787,809.50/x
3. Step 3: Cross multiply
   495,680x = 787,809.50 × 787,809.50
4. Step 4: Simplify right side
   495,680x = 620,643,808,290.25
5. Step 5: Solve for x
   x = 620,643,808,290.25/495,680
6. Step 6: Final answer
   x = 1,252,105.81