Finding the Fourth Proportional to 3,698.72, 5,101.89 and 2,812.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,698.72 : 5,101.89 = 2,812.58 : x
2. Step 2: Convert to fraction form
   3,698.72/5,101.89 = 2,812.58/x
3. Step 3: Cross multiply
   3,698.72x = 5,101.89 × 2,812.58
4. Step 4: Simplify right side
   3,698.72x = 14,349,473.78
5. Step 5: Solve for x
   x = 14,349,473.78/3,698.72
6. Step 6: Final answer
   x = 3,879.58