Finding the Fourth Proportional to 1,080.30, 1,618.83 and 591.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.30 : 1,618.83 = 591.87 : x
2. Step 2: Convert to fraction form
   1,080.30/1,618.83 = 591.87/x
3. Step 3: Cross multiply
   1,080.30x = 1,618.83 × 591.87
4. Step 4: Simplify right side
   1,080.30x = 958,136.91
5. Step 5: Solve for x
   x = 958,136.91/1,080.30
6. Step 6: Final answer
   x = 886.92