Finding the Fourth Proportional to 142,091.20, 213,090.56 and 47,301.20

Step by Step Solution

1. Step 1: Write the proportion equation
   142,091.20 : 213,090.56 = 47,301.20 : x
2. Step 2: Convert to fraction form
   142,091.20/213,090.56 = 47,301.20/x
3. Step 3: Cross multiply
   142,091.20x = 213,090.56 × 47,301.20
4. Step 4: Simplify right side
   142,091.20x = 10,079,439,196.67
5. Step 5: Solve for x
   x = 10,079,439,196.67/142,091.20
6. Step 6: Final answer
   x = 70,936.41