Finding the Fourth Proportional to 1,609.72, 2,204.72 and 1,515.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609.72 : 2,204.72 = 1,515.13 : x
2. Step 2: Convert to fraction form
   1,609.72/2,204.72 = 1,515.13/x
3. Step 3: Cross multiply
   1,609.72x = 2,204.72 × 1,515.13
4. Step 4: Simplify right side
   1,609.72x = 3,340,437.41
5. Step 5: Solve for x
   x = 3,340,437.41/1,609.72
6. Step 6: Final answer
   x = 2,075.17