Finding the Fourth Proportional to 3,916.56, 5,404.89 and 2,148.13

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.56 : 5,404.89 = 2,148.13 : x
2. Step 2: Convert to fraction form
   3,916.56/5,404.89 = 2,148.13/x
3. Step 3: Cross multiply
   3,916.56x = 5,404.89 × 2,148.13
4. Step 4: Simplify right side
   3,916.56x = 11,610,390.76
5. Step 5: Solve for x
   x = 11,610,390.76/3,916.56
6. Step 6: Final answer
   x = 2,964.44