Finding the Third Proportional to 191,609 and 395,517.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,609 : 395,517.50 = 395,517.50 : x
2. Step 2: Convert to fraction form
   191,609/395,517.50 = 395,517.50/x
3. Step 3: Cross multiply
   191,609x = 395,517.50 × 395,517.50
4. Step 4: Simplify right side
   191,609x = 156,434,092,806.25
5. Step 5: Solve for x
   x = 156,434,092,806.25/191,609
6. Step 6: Final answer
   x = 816,423.51