Finding the Fourth Proportional to 1,105.89, 1,526.21 and 608.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.89 : 1,526.21 = 608.58 : x
2. Step 2: Convert to fraction form
   1,105.89/1,526.21 = 608.58/x
3. Step 3: Cross multiply
   1,105.89x = 1,526.21 × 608.58
4. Step 4: Simplify right side
   1,105.89x = 928,817.84
5. Step 5: Solve for x
   x = 928,817.84/1,105.89
6. Step 6: Final answer
   x = 839.88