Finding the Fourth Proportional to 3,910.69, 5,403.51 and 3,770.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.69 : 5,403.51 = 3,770.56 : x
2. Step 2: Convert to fraction form
   3,910.69/5,403.51 = 3,770.56/x
3. Step 3: Cross multiply
   3,910.69x = 5,403.51 × 3,770.56
4. Step 4: Simplify right side
   3,910.69x = 20,374,258.67
5. Step 5: Solve for x
   x = 20,374,258.67/3,910.69
6. Step 6: Final answer
   x = 5,209.89