Finding the Fourth Proportional to 1,153.00, 1,590.89 and 680.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.00 : 1,590.89 = 680.67 : x
2. Step 2: Convert to fraction form
   1,153.00/1,590.89 = 680.67/x
3. Step 3: Cross multiply
   1,153.00x = 1,590.89 × 680.67
4. Step 4: Simplify right side
   1,153.00x = 1,082,864.81
5. Step 5: Solve for x
   x = 1,082,864.81/1,153.00
6. Step 6: Final answer
   x = 939.17