Finding the Fourth Proportional to 1,381.81, 1,908.27 and 910.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.81 : 1,908.27 = 910.01 : x
2. Step 2: Convert to fraction form
   1,381.81/1,908.27 = 910.01/x
3. Step 3: Cross multiply
   1,381.81x = 1,908.27 × 910.01
4. Step 4: Simplify right side
   1,381.81x = 1,736,544.78
5. Step 5: Solve for x
   x = 1,736,544.78/1,381.81
6. Step 6: Final answer
   x = 1,256.72