Finding the Fourth Proportional to 2,175.68, 3,002.39 and 1,231.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.68 : 3,002.39 = 1,231.45 : x
2. Step 2: Convert to fraction form
   2,175.68/3,002.39 = 1,231.45/x
3. Step 3: Cross multiply
   2,175.68x = 3,002.39 × 1,231.45
4. Step 4: Simplify right side
   2,175.68x = 3,697,279.50
5. Step 5: Solve for x
   x = 3,697,279.50/2,175.68
6. Step 6: Final answer
   x = 1,699.37