Finding the Fourth Proportional to 1,435.38, 1,980.82 and 938.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.38 : 1,980.82 = 938.85 : x
2. Step 2: Convert to fraction form
   1,435.38/1,980.82 = 938.85/x
3. Step 3: Cross multiply
   1,435.38x = 1,980.82 × 938.85
4. Step 4: Simplify right side
   1,435.38x = 1,859,692.86
5. Step 5: Solve for x
   x = 1,859,692.86/1,435.38
6. Step 6: Final answer
   x = 1,295.61