Finding the Fourth Proportional to 3,551.40, 5,327.55 and 1,905.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,551.40 : 5,327.55 = 1,905.69 : x
2. Step 2: Convert to fraction form
   3,551.40/5,327.55 = 1,905.69/x
3. Step 3: Cross multiply
   3,551.40x = 5,327.55 × 1,905.69
4. Step 4: Simplify right side
   3,551.40x = 10,152,658.76
5. Step 5: Solve for x
   x = 10,152,658.76/3,551.40
6. Step 6: Final answer
   x = 2,858.78