Finding the Fourth Proportional to 142,039.89, 213,060.14 and 57,740.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,039.89 : 213,060.14 = 57,740.56 : x
2. Step 2: Convert to fraction form
   142,039.89/213,060.14 = 57,740.56/x
3. Step 3: Cross multiply
   142,039.89x = 213,060.14 × 57,740.56
4. Step 4: Simplify right side
   142,039.89x = 12,302,211,797.28
5. Step 5: Solve for x
   x = 12,302,211,797.28/142,039.89
6. Step 6: Final answer
   x = 86,610.96