Finding the Fourth Proportional to 1,408.05, 1,943.53 and 910.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.05 : 1,943.53 = 910.71 : x
2. Step 2: Convert to fraction form
   1,408.05/1,943.53 = 910.71/x
3. Step 3: Cross multiply
   1,408.05x = 1,943.53 × 910.71
4. Step 4: Simplify right side
   1,408.05x = 1,769,989.93
5. Step 5: Solve for x
   x = 1,769,989.93/1,408.05
6. Step 6: Final answer
   x = 1,257.05