Finding the Fourth Proportional to 5,164.48, 7,126.71 and 2,806.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,164.48 : 7,126.71 = 2,806.61 : x
2. Step 2: Convert to fraction form
   5,164.48/7,126.71 = 2,806.61/x
3. Step 3: Cross multiply
   5,164.48x = 7,126.71 × 2,806.61
4. Step 4: Simplify right side
   5,164.48x = 20,001,895.55
5. Step 5: Solve for x
   x = 20,001,895.55/5,164.48
6. Step 6: Final answer
   x = 3,872.97