Finding the Fourth Proportional to 1,131.14, 1,693.40 and 858.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.14 : 1,693.40 = 858.31 : x
2. Step 2: Convert to fraction form
   1,131.14/1,693.40 = 858.31/x
3. Step 3: Cross multiply
   1,131.14x = 1,693.40 × 858.31
4. Step 4: Simplify right side
   1,131.14x = 1,453,462.15
5. Step 5: Solve for x
   x = 1,453,462.15/1,131.14
6. Step 6: Final answer
   x = 1,284.95