Finding the Third Proportional to 63,905.50 and 138,390

Step by Step Solution

1. Step 1: Write the proportion equation
   63,905.50 : 138,390 = 138,390 : x
2. Step 2: Convert to fraction form
   63,905.50/138,390 = 138,390/x
3. Step 3: Cross multiply
   63,905.50x = 138,390 × 138,390
4. Step 4: Simplify right side
   63,905.50x = 19,151,792,100
5. Step 5: Solve for x
   x = 19,151,792,100/63,905.50
6. Step 6: Final answer
   x = 299,689.26