Finding the Third Proportional to 38,656 and 55,131

Step by Step Solution

1. Step 1: Write the proportion equation
   38,656 : 55,131 = 55,131 : x
2. Step 2: Convert to fraction form
   38,656/55,131 = 55,131/x
3. Step 3: Cross multiply
   38,656x = 55,131 × 55,131
4. Step 4: Simplify right side
   38,656x = 3,039,427,161
5. Step 5: Solve for x
   x = 3,039,427,161/38,656
6. Step 6: Final answer
   x = 78,627.57