Finding the Fourth Proportional to 10,085.52, 13,915.72 and 6,105.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.52 : 13,915.72 = 6,105.79 : x
2. Step 2: Convert to fraction form
   10,085.52/13,915.72 = 6,105.79/x
3. Step 3: Cross multiply
   10,085.52x = 13,915.72 × 6,105.79
4. Step 4: Simplify right side
   10,085.52x = 84,966,464.02
5. Step 5: Solve for x
   x = 84,966,464.02/10,085.52
6. Step 6: Final answer
   x = 8,424.60