Finding the Fourth Proportional to 1,085.56, 1,626.76 and 591.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.56 : 1,626.76 = 591.55 : x
2. Step 2: Convert to fraction form
   1,085.56/1,626.76 = 591.55/x
3. Step 3: Cross multiply
   1,085.56x = 1,626.76 × 591.55
4. Step 4: Simplify right side
   1,085.56x = 962,306.55
5. Step 5: Solve for x
   x = 962,306.55/1,085.56
6. Step 6: Final answer
   x = 886.46