Finding the Fourth Proportional to 142,059.83, 213,090.04 and 57,760.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,059.83 : 213,090.04 = 57,760.49 : x
2. Step 2: Convert to fraction form
   142,059.83/213,090.04 = 57,760.49/x
3. Step 3: Cross multiply
   142,059.83x = 213,090.04 × 57,760.49
4. Step 4: Simplify right side
   142,059.83x = 12,308,185,729.45
5. Step 5: Solve for x
   x = 12,308,185,729.45/142,059.83
6. Step 6: Final answer
   x = 86,640.86