Finding the Fourth Proportional to 3,916.53, 5,404.56 and 2,147.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.53 : 5,404.56 = 2,147.76 : x
2. Step 2: Convert to fraction form
   3,916.53/5,404.56 = 2,147.76/x
3. Step 3: Cross multiply
   3,916.53x = 5,404.56 × 2,147.76
4. Step 4: Simplify right side
   3,916.53x = 11,607,697.79
5. Step 5: Solve for x
   x = 11,607,697.79/3,916.53
6. Step 6: Final answer
   x = 2,963.77