Finding the Fourth Proportional to 1,146.42, 1,582.29 and 680.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.42 : 1,582.29 = 680.94 : x
2. Step 2: Convert to fraction form
   1,146.42/1,582.29 = 680.94/x
3. Step 3: Cross multiply
   1,146.42x = 1,582.29 × 680.94
4. Step 4: Simplify right side
   1,146.42x = 1,077,444.55
5. Step 5: Solve for x
   x = 1,077,444.55/1,146.42
6. Step 6: Final answer
   x = 939.83