Finding the Fourth Proportional to 59,608.79, 89,357.59 and 20,138.30

Step by Step Solution

1. Step 1: Write the proportion equation
   59,608.79 : 89,357.59 = 20,138.30 : x
2. Step 2: Convert to fraction form
   59,608.79/89,357.59 = 20,138.30/x
3. Step 3: Cross multiply
   59,608.79x = 89,357.59 × 20,138.30
4. Step 4: Simplify right side
   59,608.79x = 1,799,509,954.70
5. Step 5: Solve for x
   x = 1,799,509,954.70/59,608.79
6. Step 6: Final answer
   x = 30,188.67