Finding the Fourth Proportional to 2,175.59, 3,002.36 and 1,231.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.59 : 3,002.36 = 1,231.29 : x
2. Step 2: Convert to fraction form
   2,175.59/3,002.36 = 1,231.29/x
3. Step 3: Cross multiply
   2,175.59x = 3,002.36 × 1,231.29
4. Step 4: Simplify right side
   2,175.59x = 3,696,769.69
5. Step 5: Solve for x
   x = 3,696,769.69/2,175.59
6. Step 6: Final answer
   x = 1,699.21