Finding the Fourth Proportional to 1,620.93, 2,433.83 and 928.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.93 : 2,433.83 = 928.38 : x
2. Step 2: Convert to fraction form
   1,620.93/2,433.83 = 928.38/x
3. Step 3: Cross multiply
   1,620.93x = 2,433.83 × 928.38
4. Step 4: Simplify right side
   1,620.93x = 2,259,514.45
5. Step 5: Solve for x
   x = 2,259,514.45/1,620.93
6. Step 6: Final answer
   x = 1,393.96