Finding the Fourth Proportional to 2,279.88, 3,146.23 and 1,231.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.88 : 3,146.23 = 1,231.94 : x
2. Step 2: Convert to fraction form
   2,279.88/3,146.23 = 1,231.94/x
3. Step 3: Cross multiply
   2,279.88x = 3,146.23 × 1,231.94
4. Step 4: Simplify right side
   2,279.88x = 3,875,966.59
5. Step 5: Solve for x
   x = 3,875,966.59/2,279.88
6. Step 6: Final answer
   x = 1,700.07