Finding the Fourth Proportional to 3,700.05, 5,105.86 and 2,021.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.05 : 5,105.86 = 2,021.12 : x
2. Step 2: Convert to fraction form
   3,700.05/5,105.86 = 2,021.12/x
3. Step 3: Cross multiply
   3,700.05x = 5,105.86 × 2,021.12
4. Step 4: Simplify right side
   3,700.05x = 10,319,555.76
5. Step 5: Solve for x
   x = 10,319,555.76/3,700.05
6. Step 6: Final answer
   x = 2,789.03