Finding the Third Proportional to 66,516.50 and 144,105

Step by Step Solution

1. Step 1: Write the proportion equation
   66,516.50 : 144,105 = 144,105 : x
2. Step 2: Convert to fraction form
   66,516.50/144,105 = 144,105/x
3. Step 3: Cross multiply
   66,516.50x = 144,105 × 144,105
4. Step 4: Simplify right side
   66,516.50x = 20,766,251,025
5. Step 5: Solve for x
   x = 20,766,251,025/66,516.50
6. Step 6: Final answer
   x = 312,196.99