Finding the Fourth Proportional to 3,648.55, 5,471.74 and 1,916.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,648.55 : 5,471.74 = 1,916.23 : x
2. Step 2: Convert to fraction form
   3,648.55/5,471.74 = 1,916.23/x
3. Step 3: Cross multiply
   3,648.55x = 5,471.74 × 1,916.23
4. Step 4: Simplify right side
   3,648.55x = 10,485,112.34
5. Step 5: Solve for x
   x = 10,485,112.34/3,648.55
6. Step 6: Final answer
   x = 2,873.78