Finding the Fourth Proportional to 1,152.62, 1,590.61 and 680.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.62 : 1,590.61 = 680.51 : x
2. Step 2: Convert to fraction form
   1,152.62/1,590.61 = 680.51/x
3. Step 3: Cross multiply
   1,152.62x = 1,590.61 × 680.51
4. Step 4: Simplify right side
   1,152.62x = 1,082,433.71
5. Step 5: Solve for x
   x = 1,082,433.71/1,152.62
6. Step 6: Final answer
   x = 939.11