Finding the Fourth Proportional to 1,385.03, 1,911.33 and 825.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.03 : 1,911.33 = 825.53 : x
2. Step 2: Convert to fraction form
   1,385.03/1,911.33 = 825.53/x
3. Step 3: Cross multiply
   1,385.03x = 1,911.33 × 825.53
4. Step 4: Simplify right side
   1,385.03x = 1,577,850.70
5. Step 5: Solve for x
   x = 1,577,850.70/1,385.03
6. Step 6: Final answer
   x = 1,139.22