Finding the Fourth Proportional to 85,640.60, 118,181.59 and 47,401.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,640.60 : 118,181.59 = 47,401.72 : x
2. Step 2: Convert to fraction form
   85,640.60/118,181.59 = 47,401.72/x
3. Step 3: Cross multiply
   85,640.60x = 118,181.59 × 47,401.72
4. Step 4: Simplify right side
   85,640.60x = 5,602,010,638.33
5. Step 5: Solve for x
   x = 5,602,010,638.33/85,640.60
6. Step 6: Final answer
   x = 65,413.02