Finding the Third Proportional to 138,248 and 303,280

Step by Step Solution

1. Step 1: Write the proportion equation
   138,248 : 303,280 = 303,280 : x
2. Step 2: Convert to fraction form
   138,248/303,280 = 303,280/x
3. Step 3: Cross multiply
   138,248x = 303,280 × 303,280
4. Step 4: Simplify right side
   138,248x = 91,978,758,400
5. Step 5: Solve for x
   x = 91,978,758,400/138,248
6. Step 6: Final answer
   x = 665,317.10