Finding the Fourth Proportional to 3,916.38, 5,404.42 and 2,148.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.38 : 5,404.42 = 2,148.02 : x
2. Step 2: Convert to fraction form
   3,916.38/5,404.42 = 2,148.02/x
3. Step 3: Cross multiply
   3,916.38x = 5,404.42 × 2,148.02
4. Step 4: Simplify right side
   3,916.38x = 11,608,798.18
5. Step 5: Solve for x
   x = 11,608,798.18/3,916.38
6. Step 6: Final answer
   x = 2,964.16