Finding the Fourth Proportional to 85,641.72, 118,185.72 and 47,916

Step by Step Solution

1. Step 1: Write the proportion equation
   85,641.72 : 118,185.72 = 47,916 : x
2. Step 2: Convert to fraction form
   85,641.72/118,185.72 = 47,916/x
3. Step 3: Cross multiply
   85,641.72x = 118,185.72 × 47,916
4. Step 4: Simplify right side
   85,641.72x = 5,662,986,959.52
5. Step 5: Solve for x
   x = 5,662,986,959.52/85,641.72
6. Step 6: Final answer
   x = 66,124.16