Finding the Third Proportional to 156,208.50 and 340,686

Step by Step Solution

1. Step 1: Write the proportion equation
   156,208.50 : 340,686 = 340,686 : x
2. Step 2: Convert to fraction form
   156,208.50/340,686 = 340,686/x
3. Step 3: Cross multiply
   156,208.50x = 340,686 × 340,686
4. Step 4: Simplify right side
   156,208.50x = 116,066,950,596
5. Step 5: Solve for x
   x = 116,066,950,596/156,208.50
6. Step 6: Final answer
   x = 743,025.83