Finding the Fourth Proportional to 1,380.41, 1,905.47 and 914.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.41 : 1,905.47 = 914.81 : x
2. Step 2: Convert to fraction form
   1,380.41/1,905.47 = 914.81/x
3. Step 3: Cross multiply
   1,380.41x = 1,905.47 × 914.81
4. Step 4: Simplify right side
   1,380.41x = 1,743,143.01
5. Step 5: Solve for x
   x = 1,743,143.01/1,380.41
6. Step 6: Final answer
   x = 1,262.77