Finding the Third Proportional to 66,499.50 and 144,663

Step by Step Solution

1. Step 1: Write the proportion equation
   66,499.50 : 144,663 = 144,663 : x
2. Step 2: Convert to fraction form
   66,499.50/144,663 = 144,663/x
3. Step 3: Cross multiply
   66,499.50x = 144,663 × 144,663
4. Step 4: Simplify right side
   66,499.50x = 20,927,383,569
5. Step 5: Solve for x
   x = 20,927,383,569/66,499.50
6. Step 6: Final answer
   x = 314,699.86