Finding the Third Proportional to 99,789.75 and 154,939.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,789.75 : 154,939.50 = 154,939.50 : x
2. Step 2: Convert to fraction form
   99,789.75/154,939.50 = 154,939.50/x
3. Step 3: Cross multiply
   99,789.75x = 154,939.50 × 154,939.50
4. Step 4: Simplify right side
   99,789.75x = 24,006,248,660.25
5. Step 5: Solve for x
   x = 24,006,248,660.25/99,789.75
6. Step 6: Final answer
   x = 240,568.28