Finding the Fourth Proportional to 142,011.63, 213,046.61 and 57,771.58

Step by Step Solution

1. Step 1: Write the proportion equation
   142,011.63 : 213,046.61 = 57,771.58 : x
2. Step 2: Convert to fraction form
   142,011.63/213,046.61 = 57,771.58/x
3. Step 3: Cross multiply
   142,011.63x = 213,046.61 × 57,771.58
4. Step 4: Simplify right side
   142,011.63x = 12,308,038,851.33
5. Step 5: Solve for x
   x = 12,308,038,851.33/142,011.63
6. Step 6: Final answer
   x = 86,669.23