Finding the Fourth Proportional to 1,007.00, 1,389.83 and 587.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.00 : 1,389.83 = 587.60 : x
2. Step 2: Convert to fraction form
   1,007.00/1,389.83 = 587.60/x
3. Step 3: Cross multiply
   1,007.00x = 1,389.83 × 587.60
4. Step 4: Simplify right side
   1,007.00x = 816,658.63
5. Step 5: Solve for x
   x = 816,658.63/1,007.00
6. Step 6: Final answer
   x = 810.99