Finding the Fourth Proportional to 7,116.06, 10,659.21 and 5,721.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,116.06 : 10,659.21 = 5,721.86 : x
2. Step 2: Convert to fraction form
   7,116.06/10,659.21 = 5,721.86/x
3. Step 3: Cross multiply
   7,116.06x = 10,659.21 × 5,721.86
4. Step 4: Simplify right side
   7,116.06x = 60,990,454.03
5. Step 5: Solve for x
   x = 60,990,454.03/7,116.06
6. Step 6: Final answer
   x = 8,570.82