Finding the Fourth Proportional to 1,056.42, 1,584.83 and 479.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.42 : 1,584.83 = 479.34 : x
2. Step 2: Convert to fraction form
   1,056.42/1,584.83 = 479.34/x
3. Step 3: Cross multiply
   1,056.42x = 1,584.83 × 479.34
4. Step 4: Simplify right side
   1,056.42x = 759,672.41
5. Step 5: Solve for x
   x = 759,672.41/1,056.42
6. Step 6: Final answer
   x = 719.10