Finding the Third Proportional to 66,485.50 and 144,048

Step by Step Solution

1. Step 1: Write the proportion equation
   66,485.50 : 144,048 = 144,048 : x
2. Step 2: Convert to fraction form
   66,485.50/144,048 = 144,048/x
3. Step 3: Cross multiply
   66,485.50x = 144,048 × 144,048
4. Step 4: Simplify right side
   66,485.50x = 20,749,826,304
5. Step 5: Solve for x
   x = 20,749,826,304/66,485.50
6. Step 6: Final answer
   x = 312,095.51