Finding the Fourth Proportional to 59,598.79, 89,342.60 and 20,128.30

Step by Step Solution

1. Step 1: Write the proportion equation
   59,598.79 : 89,342.60 = 20,128.30 : x
2. Step 2: Convert to fraction form
   59,598.79/89,342.60 = 20,128.30/x
3. Step 3: Cross multiply
   59,598.79x = 89,342.60 × 20,128.30
4. Step 4: Simplify right side
   59,598.79x = 1,798,314,331.58
5. Step 5: Solve for x
   x = 1,798,314,331.58/59,598.79
6. Step 6: Final answer
   x = 30,173.67