Finding the Fourth Proportional to 2,279.82, 3,146.16 and 1,231.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.82 : 3,146.16 = 1,231.89 : x
2. Step 2: Convert to fraction form
   2,279.82/3,146.16 = 1,231.89/x
3. Step 3: Cross multiply
   2,279.82x = 3,146.16 × 1,231.89
4. Step 4: Simplify right side
   2,279.82x = 3,875,706.62
5. Step 5: Solve for x
   x = 3,875,706.62/2,279.82
6. Step 6: Final answer
   x = 1,700.00