Finding the Fourth Proportional to 54,111.69, 80,771.28 and 47,720.24

Step by Step Solution

1. Step 1: Write the proportion equation
   54,111.69 : 80,771.28 = 47,720.24 : x
2. Step 2: Convert to fraction form
   54,111.69/80,771.28 = 47,720.24/x
3. Step 3: Cross multiply
   54,111.69x = 80,771.28 × 47,720.24
4. Step 4: Simplify right side
   54,111.69x = 3,854,424,462.85
5. Step 5: Solve for x
   x = 3,854,424,462.85/54,111.69
6. Step 6: Final answer
   x = 71,230.90