Finding the Fourth Proportional to 1,147.82, 1,718.55 and 869.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.82 : 1,718.55 = 869.32 : x
2. Step 2: Convert to fraction form
   1,147.82/1,718.55 = 869.32/x
3. Step 3: Cross multiply
   1,147.82x = 1,718.55 × 869.32
4. Step 4: Simplify right side
   1,147.82x = 1,493,969.89
5. Step 5: Solve for x
   x = 1,493,969.89/1,147.82
6. Step 6: Final answer
   x = 1,301.57