Finding the Fourth Proportional to 1,316.00, 1,974.33 and 391.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,316.00 : 1,974.33 = 391.55 : x
2. Step 2: Convert to fraction form
   1,316.00/1,974.33 = 391.55/x
3. Step 3: Cross multiply
   1,316.00x = 1,974.33 × 391.55
4. Step 4: Simplify right side
   1,316.00x = 773,039.04
5. Step 5: Solve for x
   x = 773,039.04/1,316.00
6. Step 6: Final answer
   x = 587.42