Finding the Fourth Proportional to 1,091.29, 1,506.69 and 842.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.29 : 1,506.69 = 842.17 : x
2. Step 2: Convert to fraction form
   1,091.29/1,506.69 = 842.17/x
3. Step 3: Cross multiply
   1,091.29x = 1,506.69 × 842.17
4. Step 4: Simplify right side
   1,091.29x = 1,268,889.12
5. Step 5: Solve for x
   x = 1,268,889.12/1,091.29
6. Step 6: Final answer
   x = 1,162.74