Finding the Fourth Proportional to 5,708.27, 7,881.12 and 5,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,708.27 : 7,881.12 = 5,109.72 : x
2. Step 2: Convert to fraction form
   5,708.27/7,881.12 = 5,109.72/x
3. Step 3: Cross multiply
   5,708.27x = 7,881.12 × 5,109.72
4. Step 4: Simplify right side
   5,708.27x = 40,270,316.49
5. Step 5: Solve for x
   x = 40,270,316.49/5,708.27
6. Step 6: Final answer
   x = 7,054.74