Finding the Fourth Proportional to 80,916.48, 111,665.28 and 47,382.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,916.48 : 111,665.28 = 47,382.72 : x
2. Step 2: Convert to fraction form
   80,916.48/111,665.28 = 47,382.72/x
3. Step 3: Cross multiply
   80,916.48x = 111,665.28 × 47,382.72
4. Step 4: Simplify right side
   80,916.48x = 5,291,004,695.96
5. Step 5: Solve for x
   x = 5,291,004,695.96/80,916.48
6. Step 6: Final answer
   x = 65,388.47