Finding the Fourth Proportional to 8,479.89, 11,702.61 and 5,122.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,479.89 : 11,702.61 = 5,122.71 : x
2. Step 2: Convert to fraction form
   8,479.89/11,702.61 = 5,122.71/x
3. Step 3: Cross multiply
   8,479.89x = 11,702.61 × 5,122.71
4. Step 4: Simplify right side
   8,479.89x = 59,949,077.27
5. Step 5: Solve for x
   x = 59,949,077.27/8,479.89
6. Step 6: Final answer
   x = 7,069.56