Finding the Fourth Proportional to 2,505.78, 3,457.92 and 1,511.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.78 : 3,457.92 = 1,511.88 : x
2. Step 2: Convert to fraction form
   2,505.78/3,457.92 = 1,511.88/x
3. Step 3: Cross multiply
   2,505.78x = 3,457.92 × 1,511.88
4. Step 4: Simplify right side
   2,505.78x = 5,227,960.09
5. Step 5: Solve for x
   x = 5,227,960.09/2,505.78
6. Step 6: Final answer
   x = 2,086.36