Finding the Fourth Proportional to 1,315.98, 1,972.62 and 949.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.98 : 1,972.62 = 949.86 : x
2. Step 2: Convert to fraction form
   1,315.98/1,972.62 = 949.86/x
3. Step 3: Cross multiply
   1,315.98x = 1,972.62 × 949.86
4. Step 4: Simplify right side
   1,315.98x = 1,873,712.83
5. Step 5: Solve for x
   x = 1,873,712.83/1,315.98
6. Step 6: Final answer
   x = 1,423.82