Finding the Fourth Proportional to 1,007.03, 1,389.71 and 587.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.03 : 1,389.71 = 587.67 : x
2. Step 2: Convert to fraction form
   1,007.03/1,389.71 = 587.67/x
3. Step 3: Cross multiply
   1,007.03x = 1,389.71 × 587.67
4. Step 4: Simplify right side
   1,007.03x = 816,691.41
5. Step 5: Solve for x
   x = 816,691.41/1,007.03
6. Step 6: Final answer
   x = 810.99