Finding the Fourth Proportional to 1,435.32, 1,979.40 and 956.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.32 : 1,979.40 = 956.58 : x
2. Step 2: Convert to fraction form
   1,435.32/1,979.40 = 956.58/x
3. Step 3: Cross multiply
   1,435.32x = 1,979.40 × 956.58
4. Step 4: Simplify right side
   1,435.32x = 1,893,454.45
5. Step 5: Solve for x
   x = 1,893,454.45/1,435.32
6. Step 6: Final answer
   x = 1,319.19