Finding the Third Proportional to 55,621 and 86,196

Step by Step Solution

1. Step 1: Write the proportion equation
   55,621 : 86,196 = 86,196 : x
2. Step 2: Convert to fraction form
   55,621/86,196 = 86,196/x
3. Step 3: Cross multiply
   55,621x = 86,196 × 86,196
4. Step 4: Simplify right side
   55,621x = 7,429,750,416
5. Step 5: Solve for x
   x = 7,429,750,416/55,621
6. Step 6: Final answer
   x = 133,578.15