Finding the Fourth Proportional to 1,089.27, 1,503.22 and 591.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.27 : 1,503.22 = 591.94 : x
2. Step 2: Convert to fraction form
   1,089.27/1,503.22 = 591.94/x
3. Step 3: Cross multiply
   1,089.27x = 1,503.22 × 591.94
4. Step 4: Simplify right side
   1,089.27x = 889,818.67
5. Step 5: Solve for x
   x = 889,818.67/1,089.27
6. Step 6: Final answer
   x = 816.89