Finding the Fourth Proportional to 1,059.42, 1,587.09 and 874.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.42 : 1,587.09 = 874.61 : x
2. Step 2: Convert to fraction form
   1,059.42/1,587.09 = 874.61/x
3. Step 3: Cross multiply
   1,059.42x = 1,587.09 × 874.61
4. Step 4: Simplify right side
   1,059.42x = 1,388,084.78
5. Step 5: Solve for x
   x = 1,388,084.78/1,059.42
6. Step 6: Final answer
   x = 1,310.23