Finding the Fourth Proportional to 3,747.50, 5,171.55 and 2,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,747.50 : 5,171.55 = 2,091.50 : x
2. Step 2: Convert to fraction form
   3,747.50/5,171.55 = 2,091.50/x
3. Step 3: Cross multiply
   3,747.50x = 5,171.55 × 2,091.50
4. Step 4: Simplify right side
   3,747.50x = 10,816,296.83
5. Step 5: Solve for x
   x = 10,816,296.83/3,747.50
6. Step 6: Final answer
   x = 2,886.27