Finding the Fourth Proportional to 3,555.42, 5,333.56 and 1,909.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,555.42 : 5,333.56 = 1,909.70 : x
2. Step 2: Convert to fraction form
   3,555.42/5,333.56 = 1,909.70/x
3. Step 3: Cross multiply
   3,555.42x = 5,333.56 × 1,909.70
4. Step 4: Simplify right side
   3,555.42x = 10,185,499.53
5. Step 5: Solve for x
   x = 10,185,499.53/3,555.42
6. Step 6: Final answer
   x = 2,864.78