Finding the Fourth Proportional to 57,085.47, 85,662.03 and 31,806.15

Step by Step Solution

1. Step 1: Write the proportion equation
   57,085.47 : 85,662.03 = 31,806.15 : x
2. Step 2: Convert to fraction form
   57,085.47/85,662.03 = 31,806.15/x
3. Step 3: Cross multiply
   57,085.47x = 85,662.03 × 31,806.15
4. Step 4: Simplify right side
   57,085.47x = 2,724,579,375.48
5. Step 5: Solve for x
   x = 2,724,579,375.48/57,085.47
6. Step 6: Final answer
   x = 47,728.07