Finding the Third Proportional to 55,422 and 85,320

Step by Step Solution

1. Step 1: Write the proportion equation
   55,422 : 85,320 = 85,320 : x
2. Step 2: Convert to fraction form
   55,422/85,320 = 85,320/x
3. Step 3: Cross multiply
   55,422x = 85,320 × 85,320
4. Step 4: Simplify right side
   55,422x = 7,279,502,400
5. Step 5: Solve for x
   x = 7,279,502,400/55,422
6. Step 6: Final answer
   x = 131,346.80