Finding the Third Proportional to 121,648.50 and 187,086.38

Step by Step Solution

1. Step 1: Write the proportion equation
   121,648.50 : 187,086.38 = 187,086.38 : x
2. Step 2: Convert to fraction form
   121,648.50/187,086.38 = 187,086.38/x
3. Step 3: Cross multiply
   121,648.50x = 187,086.38 × 187,086.38
4. Step 4: Simplify right side
   121,648.50x = 35,001,311,710.64
5. Step 5: Solve for x
   x = 35,001,311,710.64/121,648.50
6. Step 6: Final answer
   x = 287,724.98