Finding the Fourth Proportional to 10,931.41, 15,086.69 and 6,216.13

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.41 : 15,086.69 = 6,216.13 : x
2. Step 2: Convert to fraction form
   10,931.41/15,086.69 = 6,216.13/x
3. Step 3: Cross multiply
   10,931.41x = 15,086.69 × 6,216.13
4. Step 4: Simplify right side
   10,931.41x = 93,780,826.31
5. Step 5: Solve for x
   x = 93,780,826.31/10,931.41
6. Step 6: Final answer
   x = 8,579.02