Finding the Fourth Proportional to 1,139.00, 1,708.65 and 359.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.00 : 1,708.65 = 359.06 : x
2. Step 2: Convert to fraction form
   1,139.00/1,708.65 = 359.06/x
3. Step 3: Cross multiply
   1,139.00x = 1,708.65 × 359.06
4. Step 4: Simplify right side
   1,139.00x = 613,499.33
5. Step 5: Solve for x
   x = 613,499.33/1,139.00
6. Step 6: Final answer
   x = 538.63