Finding the Third Proportional to 352,638 and 495,510.75

Step by Step Solution

1. Step 1: Write the proportion equation
   352,638 : 495,510.75 = 495,510.75 : x
2. Step 2: Convert to fraction form
   352,638/495,510.75 = 495,510.75/x
3. Step 3: Cross multiply
   352,638x = 495,510.75 × 495,510.75
4. Step 4: Simplify right side
   352,638x = 245,530,903,365.56
5. Step 5: Solve for x
   x = 245,530,903,365.56/352,638
6. Step 6: Final answer
   x = 696,268.99