Finding the Fourth Proportional to 1,694.56, 2,540.64 and 720.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,694.56 : 2,540.64 = 720.16 : x
2. Step 2: Convert to fraction form
   1,694.56/2,540.64 = 720.16/x
3. Step 3: Cross multiply
   1,694.56x = 2,540.64 × 720.16
4. Step 4: Simplify right side
   1,694.56x = 1,829,667.30
5. Step 5: Solve for x
   x = 1,829,667.30/1,694.56
6. Step 6: Final answer
   x = 1,079.73