Finding the Third Proportional to 99,660 and 154,471.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,660 : 154,471.50 = 154,471.50 : x
2. Step 2: Convert to fraction form
   99,660/154,471.50 = 154,471.50/x
3. Step 3: Cross multiply
   99,660x = 154,471.50 × 154,471.50
4. Step 4: Simplify right side
   99,660x = 23,861,444,312.25
5. Step 5: Solve for x
   x = 23,861,444,312.25/99,660
6. Step 6: Final answer
   x = 239,428.50