Finding the Fourth Proportional to 1,853.06, 2,557.21 and 1,013.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,853.06 : 2,557.21 = 1,013.76 : x
2. Step 2: Convert to fraction form
   1,853.06/2,557.21 = 1,013.76/x
3. Step 3: Cross multiply
   1,853.06x = 2,557.21 × 1,013.76
4. Step 4: Simplify right side
   1,853.06x = 2,592,388.89
5. Step 5: Solve for x
   x = 2,592,388.89/1,853.06
6. Step 6: Final answer
   x = 1,398.98