Finding the Fourth Proportional to 2,175.39, 3,002.06 and 1,231.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.39 : 3,002.06 = 1,231.18 : x
2. Step 2: Convert to fraction form
   2,175.39/3,002.06 = 1,231.18/x
3. Step 3: Cross multiply
   2,175.39x = 3,002.06 × 1,231.18
4. Step 4: Simplify right side
   2,175.39x = 3,696,081.76
5. Step 5: Solve for x
   x = 3,696,081.76/2,175.39
6. Step 6: Final answer
   x = 1,699.04