Finding the Fourth Proportional to 1,152.32, 1,590.17 and 680.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.32 : 1,590.17 = 680.22 : x
2. Step 2: Convert to fraction form
   1,152.32/1,590.17 = 680.22/x
3. Step 3: Cross multiply
   1,152.32x = 1,590.17 × 680.22
4. Step 4: Simplify right side
   1,152.32x = 1,081,662.04
5. Step 5: Solve for x
   x = 1,081,662.04/1,152.32
6. Step 6: Final answer
   x = 938.69