Finding the Fourth Proportional to 112,446.72, 168,456.96 and 57,081.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,446.72 : 168,456.96 = 57,081.60 : x
2. Step 2: Convert to fraction form
   112,446.72/168,456.96 = 57,081.60/x
3. Step 3: Cross multiply
   112,446.72x = 168,456.96 × 57,081.60
4. Step 4: Simplify right side
   112,446.72x = 9,615,792,807.94
5. Step 5: Solve for x
   x = 9,615,792,807.94/112,446.72
6. Step 6: Final answer
   x = 85,514.21