Finding the Fourth Proportional to 8,091.39, 12,127.01 and 2,891.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,091.39 : 12,127.01 = 2,891.55 : x
2. Step 2: Convert to fraction form
   8,091.39/12,127.01 = 2,891.55/x
3. Step 3: Cross multiply
   8,091.39x = 12,127.01 × 2,891.55
4. Step 4: Simplify right side
   8,091.39x = 35,065,841.31
5. Step 5: Solve for x
   x = 35,065,841.31/8,091.39
6. Step 6: Final answer
   x = 4,333.72