Finding the Fourth Proportional to 142,141.40, 213,211.68 and 57,881.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,141.40 : 213,211.68 = 57,881.72 : x
2. Step 2: Convert to fraction form
   142,141.40/213,211.68 = 57,881.72/x
3. Step 3: Cross multiply
   142,141.40x = 213,211.68 × 57,881.72
4. Step 4: Simplify right side
   142,141.40x = 12,341,058,762.49
5. Step 5: Solve for x
   x = 12,341,058,762.49/142,141.40
6. Step 6: Final answer
   x = 86,822.41