Finding the Fourth Proportional to 1,085.24, 1,498.49 and 1,002.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.24 : 1,498.49 = 1,002.31 : x
2. Step 2: Convert to fraction form
   1,085.24/1,498.49 = 1,002.31/x
3. Step 3: Cross multiply
   1,085.24x = 1,498.49 × 1,002.31
4. Step 4: Simplify right side
   1,085.24x = 1,501,951.51
5. Step 5: Solve for x
   x = 1,501,951.51/1,085.24
6. Step 6: Final answer
   x = 1,383.98