Finding the Fourth Proportional to 8,657.50, 12,992.01 and 3,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,657.50 : 12,992.01 = 3,185.50 : x
2. Step 2: Convert to fraction form
   8,657.50/12,992.01 = 3,185.50/x
3. Step 3: Cross multiply
   8,657.50x = 12,992.01 × 3,185.50
4. Step 4: Simplify right side
   8,657.50x = 41,386,047.86
5. Step 5: Solve for x
   x = 41,386,047.86/8,657.50
6. Step 6: Final answer
   x = 4,780.37