Finding the Fourth Proportional to 1,131.71, 1,557.75 and 836.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.71 : 1,557.75 = 836.47 : x
2. Step 2: Convert to fraction form
   1,131.71/1,557.75 = 836.47/x
3. Step 3: Cross multiply
   1,131.71x = 1,557.75 × 836.47
4. Step 4: Simplify right side
   1,131.71x = 1,303,007.25
5. Step 5: Solve for x
   x = 1,303,007.25/1,131.71
6. Step 6: Final answer
   x = 1,151.36