Finding the Fourth Proportional to 1,558.02, 2,150.13 and 859.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.02 : 2,150.13 = 859.38 : x
2. Step 2: Convert to fraction form
   1,558.02/2,150.13 = 859.38/x
3. Step 3: Cross multiply
   1,558.02x = 2,150.13 × 859.38
4. Step 4: Simplify right side
   1,558.02x = 1,847,778.72
5. Step 5: Solve for x
   x = 1,847,778.72/1,558.02
6. Step 6: Final answer
   x = 1,185.98