Finding the Fourth Proportional to 85,238.72, 117,631 and 47,508.92

Step by Step Solution

1. Step 1: Write the proportion equation
   85,238.72 : 117,631 = 47,508.92 : x
2. Step 2: Convert to fraction form
   85,238.72/117,631 = 47,508.92/x
3. Step 3: Cross multiply
   85,238.72x = 117,631 × 47,508.92
4. Step 4: Simplify right side
   85,238.72x = 5,588,521,768.52
5. Step 5: Solve for x
   x = 5,588,521,768.52/85,238.72
6. Step 6: Final answer
   x = 65,563.18