Finding the Fourth Proportional to 2,505.42, 3,455.04 and 2,259.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.42 : 3,455.04 = 2,259.31 : x
2. Step 2: Convert to fraction form
   2,505.42/3,455.04 = 2,259.31/x
3. Step 3: Cross multiply
   2,505.42x = 3,455.04 × 2,259.31
4. Step 4: Simplify right side
   2,505.42x = 7,806,006.42
5. Step 5: Solve for x
   x = 7,806,006.42/2,505.42
6. Step 6: Final answer
   x = 3,115.65