Finding the Fourth Proportional to 2,613.20, 3,606.32 and 1,434.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.20 : 3,606.32 = 1,434.40 : x
2. Step 2: Convert to fraction form
   2,613.20/3,606.32 = 1,434.40/x
3. Step 3: Cross multiply
   2,613.20x = 3,606.32 × 1,434.40
4. Step 4: Simplify right side
   2,613.20x = 5,172,905.41
5. Step 5: Solve for x
   x = 5,172,905.41/2,613.20
6. Step 6: Final answer
   x = 1,979.53