Finding the Fourth Proportional to 1,383.99, 1,911.56 and 1,010.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.99 : 1,911.56 = 1,010.37 : x
2. Step 2: Convert to fraction form
   1,383.99/1,911.56 = 1,010.37/x
3. Step 3: Cross multiply
   1,383.99x = 1,911.56 × 1,010.37
4. Step 4: Simplify right side
   1,383.99x = 1,931,382.88
5. Step 5: Solve for x
   x = 1,931,382.88/1,383.99
6. Step 6: Final answer
   x = 1,395.52