Finding the Third Proportional to 31,920 and 43,328

Step by Step Solution

1. Step 1: Write the proportion equation
   31,920 : 43,328 = 43,328 : x
2. Step 2: Convert to fraction form
   31,920/43,328 = 43,328/x
3. Step 3: Cross multiply
   31,920x = 43,328 × 43,328
4. Step 4: Simplify right side
   31,920x = 1,877,315,584
5. Step 5: Solve for x
   x = 1,877,315,584/31,920
6. Step 6: Final answer
   x = 58,813.14