Finding the Fourth Proportional to 2,310.79, 3,189.13 and 1,366.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.79 : 3,189.13 = 1,366.89 : x
2. Step 2: Convert to fraction form
   2,310.79/3,189.13 = 1,366.89/x
3. Step 3: Cross multiply
   2,310.79x = 3,189.13 × 1,366.89
4. Step 4: Simplify right side
   2,310.79x = 4,359,189.91
5. Step 5: Solve for x
   x = 4,359,189.91/2,310.79
6. Step 6: Final answer
   x = 1,886.45