Finding the Fourth Proportional to 3,770.72, 5,656.17 and 2,221.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,770.72 : 5,656.17 = 2,221.60 : x
2. Step 2: Convert to fraction form
   3,770.72/5,656.17 = 2,221.60/x
3. Step 3: Cross multiply
   3,770.72x = 5,656.17 × 2,221.60
4. Step 4: Simplify right side
   3,770.72x = 12,565,747.27
5. Step 5: Solve for x
   x = 12,565,747.27/3,770.72
6. Step 6: Final answer
   x = 3,332.45