Finding the Fourth Proportional to 1,116.72, 1,667.08 and 970.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.72 : 1,667.08 = 970.96 : x
2. Step 2: Convert to fraction form
   1,116.72/1,667.08 = 970.96/x
3. Step 3: Cross multiply
   1,116.72x = 1,667.08 × 970.96
4. Step 4: Simplify right side
   1,116.72x = 1,618,668.00
5. Step 5: Solve for x
   x = 1,618,668.00/1,116.72
6. Step 6: Final answer
   x = 1,449.48