Finding the Fourth Proportional to 48,087.72, 72,168.78 and 31,443.24

Step by Step Solution

1. Step 1: Write the proportion equation
   48,087.72 : 72,168.78 = 31,443.24 : x
2. Step 2: Convert to fraction form
   48,087.72/72,168.78 = 31,443.24/x
3. Step 3: Cross multiply
   48,087.72x = 72,168.78 × 31,443.24
4. Step 4: Simplify right side
   48,087.72x = 2,269,220,270.05
5. Step 5: Solve for x
   x = 2,269,220,270.05/48,087.72
6. Step 6: Final answer
   x = 47,189.18