Finding the Fourth Proportional to 3,916.71, 5,404.80 and 2,238.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.71 : 5,404.80 = 2,238.09 : x
2. Step 2: Convert to fraction form
   3,916.71/5,404.80 = 2,238.09/x
3. Step 3: Cross multiply
   3,916.71x = 5,404.80 × 2,238.09
4. Step 4: Simplify right side
   3,916.71x = 12,096,428.83
5. Step 5: Solve for x
   x = 12,096,428.83/3,916.71
6. Step 6: Final answer
   x = 3,088.42