Finding the Fourth Proportional to 142,146.27, 213,034.48 and 57,808.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,146.27 : 213,034.48 = 57,808.12 : x
2. Step 2: Convert to fraction form
   142,146.27/213,034.48 = 57,808.12/x
3. Step 3: Cross multiply
   142,146.27x = 213,034.48 × 57,808.12
4. Step 4: Simplify right side
   142,146.27x = 12,315,122,783.98
5. Step 5: Solve for x
   x = 12,315,122,783.98/142,146.27
6. Step 6: Final answer
   x = 86,636.97