Finding the Fourth Proportional to 1,916.18, 2,644.25 and 1,171.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.18 : 2,644.25 = 1,171.38 : x
2. Step 2: Convert to fraction form
   1,916.18/2,644.25 = 1,171.38/x
3. Step 3: Cross multiply
   1,916.18x = 2,644.25 × 1,171.38
4. Step 4: Simplify right side
   1,916.18x = 3,097,421.57
5. Step 5: Solve for x
   x = 3,097,421.57/1,916.18
6. Step 6: Final answer
   x = 1,616.46