Finding the Fourth Proportional to 3,916.37, 5,404.71 and 2,148.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.37 : 5,404.71 = 2,148.09 : x
2. Step 2: Convert to fraction form
   3,916.37/5,404.71 = 2,148.09/x
3. Step 3: Cross multiply
   3,916.37x = 5,404.71 × 2,148.09
4. Step 4: Simplify right side
   3,916.37x = 11,609,803.50
5. Step 5: Solve for x
   x = 11,609,803.50/3,916.37
6. Step 6: Final answer
   x = 2,964.43