Finding the Fourth Proportional to 20,132.25, 30,196.24 and 5,139.45

Step by Step Solution

1. Step 1: Write the proportion equation
   20,132.25 : 30,196.24 = 5,139.45 : x
2. Step 2: Convert to fraction form
   20,132.25/30,196.24 = 5,139.45/x
3. Step 3: Cross multiply
   20,132.25x = 30,196.24 × 5,139.45
4. Step 4: Simplify right side
   20,132.25x = 155,192,081.73
5. Step 5: Solve for x
   x = 155,192,081.73/20,132.25
6. Step 6: Final answer
   x = 7,708.63