Finding the Fourth Proportional to 2,175.57, 3,002.25 and 1,231.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.57 : 3,002.25 = 1,231.32 : x
2. Step 2: Convert to fraction form
   2,175.57/3,002.25 = 1,231.32/x
3. Step 3: Cross multiply
   2,175.57x = 3,002.25 × 1,231.32
4. Step 4: Simplify right side
   2,175.57x = 3,696,730.47
5. Step 5: Solve for x
   x = 3,696,730.47/2,175.57
6. Step 6: Final answer
   x = 1,699.20