Finding the Fourth Proportional to 1,174.31, 1,618.67 and 859.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174.31 : 1,618.67 = 859.59 : x
2. Step 2: Convert to fraction form
   1,174.31/1,618.67 = 859.59/x
3. Step 3: Cross multiply
   1,174.31x = 1,618.67 × 859.59
4. Step 4: Simplify right side
   1,174.31x = 1,391,392.55
5. Step 5: Solve for x
   x = 1,391,392.55/1,174.31
6. Step 6: Final answer
   x = 1,184.86