Finding the Fourth Proportional to 10,391.10, 14,336.15 and 5,913.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,391.10 : 14,336.15 = 5,913.72 : x
2. Step 2: Convert to fraction form
   10,391.10/14,336.15 = 5,913.72/x
3. Step 3: Cross multiply
   10,391.10x = 14,336.15 × 5,913.72
4. Step 4: Simplify right side
   10,391.10x = 84,779,947.41
5. Step 5: Solve for x
   x = 84,779,947.41/10,391.10
6. Step 6: Final answer
   x = 8,158.90