Finding the Fourth Proportional to 1,654.32, 2,479.76 and 558.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,654.32 : 2,479.76 = 558.31 : x
2. Step 2: Convert to fraction form
   1,654.32/2,479.76 = 558.31/x
3. Step 3: Cross multiply
   1,654.32x = 2,479.76 × 558.31
4. Step 4: Simplify right side
   1,654.32x = 1,384,472.01
5. Step 5: Solve for x
   x = 1,384,472.01/1,654.32
6. Step 6: Final answer
   x = 836.88