Finding the Fourth Proportional to 2,309.20, 3,186.89 and 1,314.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.20 : 3,186.89 = 1,314.79 : x
2. Step 2: Convert to fraction form
   2,309.20/3,186.89 = 1,314.79/x
3. Step 3: Cross multiply
   2,309.20x = 3,186.89 × 1,314.79
4. Step 4: Simplify right side
   2,309.20x = 4,190,084.53
5. Step 5: Solve for x
   x = 4,190,084.53/2,309.20
6. Step 6: Final answer
   x = 1,814.52