Finding the Fourth Proportional to 1,383.60, 1,908.52 and 1,010.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.60 : 1,908.52 = 1,010.13 : x
2. Step 2: Convert to fraction form
   1,383.60/1,908.52 = 1,010.13/x
3. Step 3: Cross multiply
   1,383.60x = 1,908.52 × 1,010.13
4. Step 4: Simplify right side
   1,383.60x = 1,927,853.31
5. Step 5: Solve for x
   x = 1,927,853.31/1,383.60
6. Step 6: Final answer
   x = 1,393.36