Finding the Fourth Proportional to 2,507.43, 3,457.80 and 2,261.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.43 : 3,457.80 = 2,261.31 : x
2. Step 2: Convert to fraction form
   2,507.43/3,457.80 = 2,261.31/x
3. Step 3: Cross multiply
   2,507.43x = 3,457.80 × 2,261.31
4. Step 4: Simplify right side
   2,507.43x = 7,819,157.72
5. Step 5: Solve for x
   x = 7,819,157.72/2,507.43
6. Step 6: Final answer
   x = 3,118.40