Finding the Fourth Proportional to 1,152.10, 1,589.94 and 680.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.10 : 1,589.94 = 680.32 : x
2. Step 2: Convert to fraction form
   1,152.10/1,589.94 = 680.32/x
3. Step 3: Cross multiply
   1,152.10x = 1,589.94 × 680.32
4. Step 4: Simplify right side
   1,152.10x = 1,081,667.98
5. Step 5: Solve for x
   x = 1,081,667.98/1,152.10
6. Step 6: Final answer
   x = 938.87