Finding the Fourth Proportional to 142,105.68, 213,158.55 and 72,005.04

Step by Step Solution

1. Step 1: Write the proportion equation
   142,105.68 : 213,158.55 = 72,005.04 : x
2. Step 2: Convert to fraction form
   142,105.68/213,158.55 = 72,005.04/x
3. Step 3: Cross multiply
   142,105.68x = 213,158.55 × 72,005.04
4. Step 4: Simplify right side
   142,105.68x = 15,348,489,919.09
5. Step 5: Solve for x
   x = 15,348,489,919.09/142,105.68
6. Step 6: Final answer
   x = 108,007.58