Finding the Fourth Proportional to 1,853.38, 2,557.57 and 1,013.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,853.38 : 2,557.57 = 1,013.93 : x
2. Step 2: Convert to fraction form
   1,853.38/2,557.57 = 1,013.93/x
3. Step 3: Cross multiply
   1,853.38x = 2,557.57 × 1,013.93
4. Step 4: Simplify right side
   1,853.38x = 2,593,196.95
5. Step 5: Solve for x
   x = 2,593,196.95/1,853.38
6. Step 6: Final answer
   x = 1,399.17