Finding the Fourth Proportional to 142,134.57, 213,156.50 and 57,894.57

Step by Step Solution

1. Step 1: Write the proportion equation
   142,134.57 : 213,156.50 = 57,894.57 : x
2. Step 2: Convert to fraction form
   142,134.57/213,156.50 = 57,894.57/x
3. Step 3: Cross multiply
   142,134.57x = 213,156.50 × 57,894.57
4. Step 4: Simplify right side
   142,134.57x = 12,340,603,620.73
5. Step 5: Solve for x
   x = 12,340,603,620.73/142,134.57
6. Step 6: Final answer
   x = 86,823.38