Finding the Fourth Proportional to 1,151.91, 1,722.59 and 859.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.91 : 1,722.59 = 859.62 : x
2. Step 2: Convert to fraction form
   1,151.91/1,722.59 = 859.62/x
3. Step 3: Cross multiply
   1,151.91x = 1,722.59 × 859.62
4. Step 4: Simplify right side
   1,151.91x = 1,480,768.52
5. Step 5: Solve for x
   x = 1,480,768.52/1,151.91
6. Step 6: Final answer
   x = 1,285.49