Finding the Fourth Proportional to 1,091.97, 1,507.41 and 719.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.97 : 1,507.41 = 719.15 : x
2. Step 2: Convert to fraction form
   1,091.97/1,507.41 = 719.15/x
3. Step 3: Cross multiply
   1,091.97x = 1,507.41 × 719.15
4. Step 4: Simplify right side
   1,091.97x = 1,084,053.90
5. Step 5: Solve for x
   x = 1,084,053.90/1,091.97
6. Step 6: Final answer
   x = 992.75