Finding the Fourth Proportional to 1,356.33, 1,872.42 and 859.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.33 : 1,872.42 = 859.49 : x
2. Step 2: Convert to fraction form
   1,356.33/1,872.42 = 859.49/x
3. Step 3: Cross multiply
   1,356.33x = 1,872.42 × 859.49
4. Step 4: Simplify right side
   1,356.33x = 1,609,316.90
5. Step 5: Solve for x
   x = 1,609,316.90/1,356.33
6. Step 6: Final answer
   x = 1,186.52