Finding the Fourth Proportional to 60,109.03, 90,168.23 and 20,128.16

Step by Step Solution

1. Step 1: Write the proportion equation
   60,109.03 : 90,168.23 = 20,128.16 : x
2. Step 2: Convert to fraction form
   60,109.03/90,168.23 = 20,128.16/x
3. Step 3: Cross multiply
   60,109.03x = 90,168.23 × 20,128.16
4. Step 4: Simplify right side
   60,109.03x = 1,814,920,836.10
5. Step 5: Solve for x
   x = 1,814,920,836.10/60,109.03
6. Step 6: Final answer
   x = 30,193.81