Finding the Fourth Proportional to 1,106.18, 1,658.89 and 558.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.18 : 1,658.89 = 558.01 : x
2. Step 2: Convert to fraction form
   1,106.18/1,658.89 = 558.01/x
3. Step 3: Cross multiply
   1,106.18x = 1,658.89 × 558.01
4. Step 4: Simplify right side
   1,106.18x = 925,677.21
5. Step 5: Solve for x
   x = 925,677.21/1,106.18
6. Step 6: Final answer
   x = 836.82