Finding the Fourth Proportional to 87,831.57, 131,768.34 and 28,667.34

Step by Step Solution

1. Step 1: Write the proportion equation
   87,831.57 : 131,768.34 = 28,667.34 : x
2. Step 2: Convert to fraction form
   87,831.57/131,768.34 = 28,667.34/x
3. Step 3: Cross multiply
   87,831.57x = 131,768.34 × 28,667.34
4. Step 4: Simplify right side
   87,831.57x = 3,777,447,804.02
5. Step 5: Solve for x
   x = 3,777,447,804.02/87,831.57
6. Step 6: Final answer
   x = 43,007.86