Finding the Fourth Proportional to 1,659.72, 2,491.02 and 1,111.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.72 : 2,491.02 = 1,111.08 : x
2. Step 2: Convert to fraction form
   1,659.72/2,491.02 = 1,111.08/x
3. Step 3: Cross multiply
   1,659.72x = 2,491.02 × 1,111.08
4. Step 4: Simplify right side
   1,659.72x = 2,767,722.50
5. Step 5: Solve for x
   x = 2,767,722.50/1,659.72
6. Step 6: Final answer
   x = 1,667.58