Finding the Third Proportional to 39,148 and 55,422

Step by Step Solution

1. Step 1: Write the proportion equation
   39,148 : 55,422 = 55,422 : x
2. Step 2: Convert to fraction form
   39,148/55,422 = 55,422/x
3. Step 3: Cross multiply
   39,148x = 55,422 × 55,422
4. Step 4: Simplify right side
   39,148x = 3,071,598,084
5. Step 5: Solve for x
   x = 3,071,598,084/39,148
6. Step 6: Final answer
   x = 78,461.18