Finding the Fourth Proportional to 5,164.72, 7,127.32 and 2,806.86

Step by Step Solution

1. Step 1: Write the proportion equation
   5,164.72 : 7,127.32 = 2,806.86 : x
2. Step 2: Convert to fraction form
   5,164.72/7,127.32 = 2,806.86/x
3. Step 3: Cross multiply
   5,164.72x = 7,127.32 × 2,806.86
4. Step 4: Simplify right side
   5,164.72x = 20,005,389.42
5. Step 5: Solve for x
   x = 20,005,389.42/5,164.72
6. Step 6: Final answer
   x = 3,873.47