Finding the Fourth Proportional to 1,087.50, 1,500.74 and 590.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.50 : 1,500.74 = 590.15 : x
2. Step 2: Convert to fraction form
   1,087.50/1,500.74 = 590.15/x
3. Step 3: Cross multiply
   1,087.50x = 1,500.74 × 590.15
4. Step 4: Simplify right side
   1,087.50x = 885,666.94
5. Step 5: Solve for x
   x = 885,666.94/1,087.50
6. Step 6: Final answer
   x = 814.41