Finding the Fourth Proportional to 1,091.75, 1,506.06 and 672.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.75 : 1,506.06 = 672.03 : x
2. Step 2: Convert to fraction form
   1,091.75/1,506.06 = 672.03/x
3. Step 3: Cross multiply
   1,091.75x = 1,506.06 × 672.03
4. Step 4: Simplify right side
   1,091.75x = 1,012,117.50
5. Step 5: Solve for x
   x = 1,012,117.50/1,091.75
6. Step 6: Final answer
   x = 927.06