Finding the Fourth Proportional to 1,422.19, 1,960.35 and 949.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.19 : 1,960.35 = 949.15 : x
2. Step 2: Convert to fraction form
   1,422.19/1,960.35 = 949.15/x
3. Step 3: Cross multiply
   1,422.19x = 1,960.35 × 949.15
4. Step 4: Simplify right side
   1,422.19x = 1,860,670.43
5. Step 5: Solve for x
   x = 1,860,670.43/1,422.19
6. Step 6: Final answer
   x = 1,308.31