Finding the Fourth Proportional to 2,309.10, 3,186.56 and 1,424.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.10 : 3,186.56 = 1,424.91 : x
2. Step 2: Convert to fraction form
   2,309.10/3,186.56 = 1,424.91/x
3. Step 3: Cross multiply
   2,309.10x = 3,186.56 × 1,424.91
4. Step 4: Simplify right side
   2,309.10x = 4,540,561.21
5. Step 5: Solve for x
   x = 4,540,561.21/2,309.10
6. Step 6: Final answer
   x = 1,966.38