Finding the Fourth Proportional to 1,558.42, 2,150.56 and 850.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.42 : 2,150.56 = 850.25 : x
2. Step 2: Convert to fraction form
   1,558.42/2,150.56 = 850.25/x
3. Step 3: Cross multiply
   1,558.42x = 2,150.56 × 850.25
4. Step 4: Simplify right side
   1,558.42x = 1,828,513.64
5. Step 5: Solve for x
   x = 1,828,513.64/1,558.42
6. Step 6: Final answer
   x = 1,173.31