Finding the Fourth Proportional to 1,087.56, 1,500.83 and 590.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.56 : 1,500.83 = 590.21 : x
2. Step 2: Convert to fraction form
   1,087.56/1,500.83 = 590.21/x
3. Step 3: Cross multiply
   1,087.56x = 1,500.83 × 590.21
4. Step 4: Simplify right side
   1,087.56x = 885,804.87
5. Step 5: Solve for x
   x = 885,804.87/1,087.56
6. Step 6: Final answer
   x = 814.49