Finding the Fourth Proportional to 3,916.69, 5,874.12 and 1,142.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.69 : 5,874.12 = 1,142.78 : x
2. Step 2: Convert to fraction form
   3,916.69/5,874.12 = 1,142.78/x
3. Step 3: Cross multiply
   3,916.69x = 5,874.12 × 1,142.78
4. Step 4: Simplify right side
   3,916.69x = 6,712,797.48
5. Step 5: Solve for x
   x = 6,712,797.48/3,916.69
6. Step 6: Final answer
   x = 1,713.90