Finding the Third Proportional to 40,272 and 55,648

Step by Step Solution

1. Step 1: Write the proportion equation
   40,272 : 55,648 = 55,648 : x
2. Step 2: Convert to fraction form
   40,272/55,648 = 55,648/x
3. Step 3: Cross multiply
   40,272x = 55,648 × 55,648
4. Step 4: Simplify right side
   40,272x = 3,096,699,904
5. Step 5: Solve for x
   x = 3,096,699,904/40,272
6. Step 6: Final answer
   x = 76,894.61