Finding the Fourth Proportional to 1,558.83, 2,151.15 and 850.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.83 : 2,151.15 = 850.67 : x
2. Step 2: Convert to fraction form
   1,558.83/2,151.15 = 850.67/x
3. Step 3: Cross multiply
   1,558.83x = 2,151.15 × 850.67
4. Step 4: Simplify right side
   1,558.83x = 1,829,919.40
5. Step 5: Solve for x
   x = 1,829,919.40/1,558.83
6. Step 6: Final answer
   x = 1,173.91