Finding the Fourth Proportional to 142,114.71, 213,196.69 and 57,920.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,114.71 : 213,196.69 = 57,920.68 : x
2. Step 2: Convert to fraction form
   142,114.71/213,196.69 = 57,920.68/x
3. Step 3: Cross multiply
   142,114.71x = 213,196.69 × 57,920.68
4. Step 4: Simplify right side
   142,114.71x = 12,348,496,362.40
5. Step 5: Solve for x
   x = 12,348,496,362.40/142,114.71
6. Step 6: Final answer
   x = 86,891.05