Finding the Fourth Proportional to 1,853.72, 2,559.20 and 1,384.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,853.72 : 2,559.20 = 1,384.20 : x
2. Step 2: Convert to fraction form
   1,853.72/2,559.20 = 1,384.20/x
3. Step 3: Cross multiply
   1,853.72x = 2,559.20 × 1,384.20
4. Step 4: Simplify right side
   1,853.72x = 3,542,437.72
5. Step 5: Solve for x
   x = 3,542,437.72/1,853.72
6. Step 6: Final answer
   x = 1,910.99