Finding the Fourth Proportional to 1,490.96, 2,056.10 and 959.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.96 : 2,056.10 = 959.30 : x
2. Step 2: Convert to fraction form
   1,490.96/2,056.10 = 959.30/x
3. Step 3: Cross multiply
   1,490.96x = 2,056.10 × 959.30
4. Step 4: Simplify right side
   1,490.96x = 1,972,411.93
5. Step 5: Solve for x
   x = 1,972,411.93/1,490.96
6. Step 6: Final answer
   x = 1,322.91