Finding the Fourth Proportional to 3,697.72, 5,100.51 and 2,811.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,697.72 : 5,100.51 = 2,811.58 : x
2. Step 2: Convert to fraction form
   3,697.72/5,100.51 = 2,811.58/x
3. Step 3: Cross multiply
   3,697.72x = 5,100.51 × 2,811.58
4. Step 4: Simplify right side
   3,697.72x = 14,340,491.91
5. Step 5: Solve for x
   x = 14,340,491.91/3,697.72
6. Step 6: Final answer
   x = 3,878.20