Finding the Fourth Proportional to 1,920.50, 2,650.38 and 1,174.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.50 : 2,650.38 = 1,174.38 : x
2. Step 2: Convert to fraction form
   1,920.50/2,650.38 = 1,174.38/x
3. Step 3: Cross multiply
   1,920.50x = 2,650.38 × 1,174.38
4. Step 4: Simplify right side
   1,920.50x = 3,112,553.26
5. Step 5: Solve for x
   x = 3,112,553.26/1,920.50
6. Step 6: Final answer
   x = 1,620.70