Finding the Fourth Proportional to 3,908.76, 5,394.27 and 2,140.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908.76 : 5,394.27 = 2,140.50 : x
2. Step 2: Convert to fraction form
   3,908.76/5,394.27 = 2,140.50/x
3. Step 3: Cross multiply
   3,908.76x = 5,394.27 × 2,140.50
4. Step 4: Simplify right side
   3,908.76x = 11,546,434.94
5. Step 5: Solve for x
   x = 11,546,434.94/3,908.76
6. Step 6: Final answer
   x = 2,953.99