Finding the Third Proportional to 122,275.50 and 288,185

Step by Step Solution

1. Step 1: Write the proportion equation
   122,275.50 : 288,185 = 288,185 : x
2. Step 2: Convert to fraction form
   122,275.50/288,185 = 288,185/x
3. Step 3: Cross multiply
   122,275.50x = 288,185 × 288,185
4. Step 4: Simplify right side
   122,275.50x = 83,050,594,225
5. Step 5: Solve for x
   x = 83,050,594,225/122,275.50
6. Step 6: Final answer
   x = 679,208.79