Finding the Fourth Proportional to 3,700.64, 5,106.72 and 2,021.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.64 : 5,106.72 = 2,021.96 : x
2. Step 2: Convert to fraction form
   3,700.64/5,106.72 = 2,021.96/x
3. Step 3: Cross multiply
   3,700.64x = 5,106.72 × 2,021.96
4. Step 4: Simplify right side
   3,700.64x = 10,325,596.34
5. Step 5: Solve for x
   x = 10,325,596.34/3,700.64
6. Step 6: Final answer
   x = 2,790.22