Finding the Fourth Proportional to 5,175.86, 7,142.72 and 2,818.01

Step by Step Solution

1. Step 1: Write the proportion equation
   5,175.86 : 7,142.72 = 2,818.01 : x
2. Step 2: Convert to fraction form
   5,175.86/7,142.72 = 2,818.01/x
3. Step 3: Cross multiply
   5,175.86x = 7,142.72 × 2,818.01
4. Step 4: Simplify right side
   5,175.86x = 20,128,242.30
5. Step 5: Solve for x
   x = 20,128,242.30/5,175.86
6. Step 6: Final answer
   x = 3,888.87