Finding the Fourth Proportional to 1,603.72, 2,403.49 and 910.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.72 : 2,403.49 = 910.70 : x
2. Step 2: Convert to fraction form
   1,603.72/2,403.49 = 910.70/x
3. Step 3: Cross multiply
   1,603.72x = 2,403.49 × 910.70
4. Step 4: Simplify right side
   1,603.72x = 2,188,858.34
5. Step 5: Solve for x
   x = 2,188,858.34/1,603.72
6. Step 6: Final answer
   x = 1,364.86