Finding the Third Proportional to 144,907.88 and 221,688

Step by Step Solution

1. Step 1: Write the proportion equation
   144,907.88 : 221,688 = 221,688 : x
2. Step 2: Convert to fraction form
   144,907.88/221,688 = 221,688/x
3. Step 3: Cross multiply
   144,907.88x = 221,688 × 221,688
4. Step 4: Simplify right side
   144,907.88x = 49,145,569,344
5. Step 5: Solve for x
   x = 49,145,569,344/144,907.88
6. Step 6: Final answer
   x = 339,150.44