Finding the Third Proportional to 38,628 and 55,134

Step by Step Solution

1. Step 1: Write the proportion equation
   38,628 : 55,134 = 55,134 : x
2. Step 2: Convert to fraction form
   38,628/55,134 = 55,134/x
3. Step 3: Cross multiply
   38,628x = 55,134 × 55,134
4. Step 4: Simplify right side
   38,628x = 3,039,757,956
5. Step 5: Solve for x
   x = 3,039,757,956/38,628
6. Step 6: Final answer
   x = 78,693.12