Finding the Fourth Proportional to 1,087.81, 1,501.15 and 590.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.81 : 1,501.15 = 590.43 : x
2. Step 2: Convert to fraction form
   1,087.81/1,501.15 = 590.43/x
3. Step 3: Cross multiply
   1,087.81x = 1,501.15 × 590.43
4. Step 4: Simplify right side
   1,087.81x = 886,326.27
5. Step 5: Solve for x
   x = 886,326.27/1,087.81
6. Step 6: Final answer
   x = 814.78