Finding the Fourth Proportional to 1,091.96, 1,507.06 and 672.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.96 : 1,507.06 = 672.38 : x
2. Step 2: Convert to fraction form
   1,091.96/1,507.06 = 672.38/x
3. Step 3: Cross multiply
   1,091.96x = 1,507.06 × 672.38
4. Step 4: Simplify right side
   1,091.96x = 1,013,317.00
5. Step 5: Solve for x
   x = 1,013,317.00/1,091.96
6. Step 6: Final answer
   x = 927.98