Finding the Fourth Proportional to 1,087.55, 1,500.80 and 590.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.55 : 1,500.80 = 590.18 : x
2. Step 2: Convert to fraction form
   1,087.55/1,500.80 = 590.18/x
3. Step 3: Cross multiply
   1,087.55x = 1,500.80 × 590.18
4. Step 4: Simplify right side
   1,087.55x = 885,731.69
5. Step 5: Solve for x
   x = 885,731.69/1,087.55
6. Step 6: Final answer
   x = 814.43