Finding the Fourth Proportional to 92,591.96, 139,072.46 and 87,369.57

Step by Step Solution

1. Step 1: Write the proportion equation
   92,591.96 : 139,072.46 = 87,369.57 : x
2. Step 2: Convert to fraction form
   92,591.96/139,072.46 = 87,369.57/x
3. Step 3: Cross multiply
   92,591.96x = 139,072.46 × 87,369.57
4. Step 4: Simplify right side
   92,591.96x = 12,150,700,592.19
5. Step 5: Solve for x
   x = 12,150,700,592.19/92,591.96
6. Step 6: Final answer
   x = 131,228.47