Finding the Fourth Proportional to 1,120.61, 1,546.32 and 672.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.61 : 1,546.32 = 672.39 : x
2. Step 2: Convert to fraction form
   1,120.61/1,546.32 = 672.39/x
3. Step 3: Cross multiply
   1,120.61x = 1,546.32 × 672.39
4. Step 4: Simplify right side
   1,120.61x = 1,039,724.78
5. Step 5: Solve for x
   x = 1,039,724.78/1,120.61
6. Step 6: Final answer
   x = 927.82