Finding the Third Proportional to 42,720 and 58,608

Step by Step Solution

1. Step 1: Write the proportion equation
   42,720 : 58,608 = 58,608 : x
2. Step 2: Convert to fraction form
   42,720/58,608 = 58,608/x
3. Step 3: Cross multiply
   42,720x = 58,608 × 58,608
4. Step 4: Simplify right side
   42,720x = 3,434,897,664
5. Step 5: Solve for x
   x = 3,434,897,664/42,720
6. Step 6: Final answer
   x = 80,404.91