Finding the Fourth Proportional to 1,091.86, 1,507.20 and 797.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.86 : 1,507.20 = 797.02 : x
2. Step 2: Convert to fraction form
   1,091.86/1,507.20 = 797.02/x
3. Step 3: Cross multiply
   1,091.86x = 1,507.20 × 797.02
4. Step 4: Simplify right side
   1,091.86x = 1,201,268.54
5. Step 5: Solve for x
   x = 1,201,268.54/1,091.86
6. Step 6: Final answer
   x = 1,100.20