Finding the Fourth Proportional to 1,105.38, 1,526.40 and 825.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.38 : 1,526.40 = 825.12 : x
2. Step 2: Convert to fraction form
   1,105.38/1,526.40 = 825.12/x
3. Step 3: Cross multiply
   1,105.38x = 1,526.40 × 825.12
4. Step 4: Simplify right side
   1,105.38x = 1,259,463.17
5. Step 5: Solve for x
   x = 1,259,463.17/1,105.38
6. Step 6: Final answer
   x = 1,139.39