Finding the Fourth Proportional to 1,081.43, 1,492.74 and 672.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.43 : 1,492.74 = 672.46 : x
2. Step 2: Convert to fraction form
   1,081.43/1,492.74 = 672.46/x
3. Step 3: Cross multiply
   1,081.43x = 1,492.74 × 672.46
4. Step 4: Simplify right side
   1,081.43x = 1,003,812.10
5. Step 5: Solve for x
   x = 1,003,812.10/1,081.43
6. Step 6: Final answer
   x = 928.23