Finding the Fourth Proportional to 2,505.72, 3,457.70 and 1,511

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.72 : 3,457.70 = 1,511 : x
2. Step 2: Convert to fraction form
   2,505.72/3,457.70 = 1,511/x
3. Step 3: Cross multiply
   2,505.72x = 3,457.70 × 1,511
4. Step 4: Simplify right side
   2,505.72x = 5,224,584.70
5. Step 5: Solve for x
   x = 5,224,584.70/2,505.72
6. Step 6: Final answer
   x = 2,085.06