Finding the Fourth Proportional to 85,171.50, 117,540.72 and 47,445.75

Step by Step Solution

1. Step 1: Write the proportion equation
   85,171.50 : 117,540.72 = 47,445.75 : x
2. Step 2: Convert to fraction form
   85,171.50/117,540.72 = 47,445.75/x
3. Step 3: Cross multiply
   85,171.50x = 117,540.72 × 47,445.75
4. Step 4: Simplify right side
   85,171.50x = 5,576,807,615.94
5. Step 5: Solve for x
   x = 5,576,807,615.94/85,171.50
6. Step 6: Final answer
   x = 65,477.39