Finding the Fourth Proportional to 1,151.93, 1,589.72 and 680.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.93 : 1,589.72 = 680.10 : x
2. Step 2: Convert to fraction form
   1,151.93/1,589.72 = 680.10/x
3. Step 3: Cross multiply
   1,151.93x = 1,589.72 × 680.10
4. Step 4: Simplify right side
   1,151.93x = 1,081,168.57
5. Step 5: Solve for x
   x = 1,081,168.57/1,151.93
6. Step 6: Final answer
   x = 938.57