Finding the Fourth Proportional to 2,963.72, 4,091.50 and 1,916.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,963.72 : 4,091.50 = 1,916.38 : x
2. Step 2: Convert to fraction form
   2,963.72/4,091.50 = 1,916.38/x
3. Step 3: Cross multiply
   2,963.72x = 4,091.50 × 1,916.38
4. Step 4: Simplify right side
   2,963.72x = 7,840,868.77
5. Step 5: Solve for x
   x = 7,840,868.77/2,963.72
6. Step 6: Final answer
   x = 2,645.62