Finding the Third Proportional to 39,120 and 58,530

Step by Step Solution

1. Step 1: Write the proportion equation
   39,120 : 58,530 = 58,530 : x
2. Step 2: Convert to fraction form
   39,120/58,530 = 58,530/x
3. Step 3: Cross multiply
   39,120x = 58,530 × 58,530
4. Step 4: Simplify right side
   39,120x = 3,425,760,900
5. Step 5: Solve for x
   x = 3,425,760,900/39,120
6. Step 6: Final answer
   x = 87,570.58