Finding the Fourth Proportional to 1,920.16, 2,648.46 and 1,330.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.16 : 2,648.46 = 1,330.89 : x
2. Step 2: Convert to fraction form
   1,920.16/2,648.46 = 1,330.89/x
3. Step 3: Cross multiply
   1,920.16x = 2,648.46 × 1,330.89
4. Step 4: Simplify right side
   1,920.16x = 3,524,808.93
5. Step 5: Solve for x
   x = 3,524,808.93/1,920.16
6. Step 6: Final answer
   x = 1,835.69