Finding the Third Proportional to 139.50 and 250.13

Step by Step Solution

1. Step 1: Write the proportion equation
   139.50 : 250.13 = 250.13 : x
2. Step 2: Convert to fraction form
   139.50/250.13 = 250.13/x
3. Step 3: Cross multiply
   139.50x = 250.13 × 250.13
4. Step 4: Simplify right side
   139.50x = 62,562.52
5. Step 5: Solve for x
   x = 62,562.52/139.50
6. Step 6: Final answer
   x = 448.48