Finding the Fourth Proportional to 1,855.87, 2,557.50 and 1,384.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,855.87 : 2,557.50 = 1,384.31 : x
2. Step 2: Convert to fraction form
   1,855.87/2,557.50 = 1,384.31/x
3. Step 3: Cross multiply
   1,855.87x = 2,557.50 × 1,384.31
4. Step 4: Simplify right side
   1,855.87x = 3,540,372.83
5. Step 5: Solve for x
   x = 3,540,372.83/1,855.87
6. Step 6: Final answer
   x = 1,907.66