Finding the Fourth Proportional to 142,840.43, 214,287.72 and 57,457.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,840.43 : 214,287.72 = 57,457.82 : x
2. Step 2: Convert to fraction form
   142,840.43/214,287.72 = 57,457.82/x
3. Step 3: Cross multiply
   142,840.43x = 214,287.72 × 57,457.82
4. Step 4: Simplify right side
   142,840.43x = 12,312,504,172.53
5. Step 5: Solve for x
   x = 12,312,504,172.53/142,840.43
6. Step 6: Final answer
   x = 86,197.62