Finding the Fourth Proportional to 142,786.15, 213,903.29 and 79,414.75

Step by Step Solution

1. Step 1: Write the proportion equation
   142,786.15 : 213,903.29 = 79,414.75 : x
2. Step 2: Convert to fraction form
   142,786.15/213,903.29 = 79,414.75/x
3. Step 3: Cross multiply
   142,786.15x = 213,903.29 × 79,414.75
4. Step 4: Simplify right side
   142,786.15x = 16,987,077,478.72
5. Step 5: Solve for x
   x = 16,987,077,478.72/142,786.15
6. Step 6: Final answer
   x = 118,968.66