Finding the Fourth Proportional to 1,382.42, 1,906.17 and 1,008.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.42 : 1,906.17 = 1,008.74 : x
2. Step 2: Convert to fraction form
   1,382.42/1,906.17 = 1,008.74/x
3. Step 3: Cross multiply
   1,382.42x = 1,906.17 × 1,008.74
4. Step 4: Simplify right side
   1,382.42x = 1,922,820.39
5. Step 5: Solve for x
   x = 1,922,820.39/1,382.42
6. Step 6: Final answer
   x = 1,390.91