Finding the Fourth Proportional to 3,699.55, 5,105.42 and 2,021.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.55 : 5,105.42 = 2,021.01 : x
2. Step 2: Convert to fraction form
   3,699.55/5,105.42 = 2,021.01/x
3. Step 3: Cross multiply
   3,699.55x = 5,105.42 × 2,021.01
4. Step 4: Simplify right side
   3,699.55x = 10,318,079.35
5. Step 5: Solve for x
   x = 10,318,079.35/3,699.55
6. Step 6: Final answer
   x = 2,789.01