Finding the Fourth Proportional to 1,603.98, 2,407.80 and 956.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.98 : 2,407.80 = 956.09 : x
2. Step 2: Convert to fraction form
   1,603.98/2,407.80 = 956.09/x
3. Step 3: Cross multiply
   1,603.98x = 2,407.80 × 956.09
4. Step 4: Simplify right side
   1,603.98x = 2,302,061.46
5. Step 5: Solve for x
   x = 2,302,061.46/1,603.98
6. Step 6: Final answer
   x = 1,435.22