Finding the Fourth Proportional to 54,231.78, 80,978.51 and 47,853.48

Step by Step Solution

1. Step 1: Write the proportion equation
   54,231.78 : 80,978.51 = 47,853.48 : x
2. Step 2: Convert to fraction form
   54,231.78/80,978.51 = 47,853.48/x
3. Step 3: Cross multiply
   54,231.78x = 80,978.51 × 47,853.48
4. Step 4: Simplify right side
   54,231.78x = 3,875,103,508.71
5. Step 5: Solve for x
   x = 3,875,103,508.71/54,231.78
6. Step 6: Final answer
   x = 71,454.48