Finding the Fourth Proportional to 1,720.52, 2,581.86 and 1,072.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,720.52 : 2,581.86 = 1,072.52 : x
2. Step 2: Convert to fraction form
   1,720.52/2,581.86 = 1,072.52/x
3. Step 3: Cross multiply
   1,720.52x = 2,581.86 × 1,072.52
4. Step 4: Simplify right side
   1,720.52x = 2,769,096.49
5. Step 5: Solve for x
   x = 2,769,096.49/1,720.52
6. Step 6: Final answer
   x = 1,609.45