Finding the Fourth Proportional to 10,672.21, 16,006.52 and 3,916.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,672.21 : 16,006.52 = 3,916.40 : x
2. Step 2: Convert to fraction form
   10,672.21/16,006.52 = 3,916.40/x
3. Step 3: Cross multiply
   10,672.21x = 16,006.52 × 3,916.40
4. Step 4: Simplify right side
   10,672.21x = 62,687,964.72
5. Step 5: Solve for x
   x = 62,687,964.72/10,672.21
6. Step 6: Final answer
   x = 5,873.94