Finding the Fourth Proportional to 1,383.71, 1,908.70 and 1,010.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.71 : 1,908.70 = 1,010.25 : x
2. Step 2: Convert to fraction form
   1,383.71/1,908.70 = 1,010.25/x
3. Step 3: Cross multiply
   1,383.71x = 1,908.70 × 1,010.25
4. Step 4: Simplify right side
   1,383.71x = 1,928,261.65
5. Step 5: Solve for x
   x = 1,928,261.65/1,383.71
6. Step 6: Final answer
   x = 1,393.55