Finding the Fourth Proportional to 1,403.33, 1,935.90 and 906.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.33 : 1,935.90 = 906.39 : x
2. Step 2: Convert to fraction form
   1,403.33/1,935.90 = 906.39/x
3. Step 3: Cross multiply
   1,403.33x = 1,935.90 × 906.39
4. Step 4: Simplify right side
   1,403.33x = 1,754,680.40
5. Step 5: Solve for x
   x = 1,754,680.40/1,403.33
6. Step 6: Final answer
   x = 1,250.37