Finding the Fourth Proportional to 1,105.42, 1,525.57 and 608.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.42 : 1,525.57 = 608.15 : x
2. Step 2: Convert to fraction form
   1,105.42/1,525.57 = 608.15/x
3. Step 3: Cross multiply
   1,105.42x = 1,525.57 × 608.15
4. Step 4: Simplify right side
   1,105.42x = 927,775.40
5. Step 5: Solve for x
   x = 927,775.40/1,105.42
6. Step 6: Final answer
   x = 839.30