Finding the Fourth Proportional to 2,019.42, 3,026.79 and 923.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.42 : 3,026.79 = 923.90 : x
2. Step 2: Convert to fraction form
   2,019.42/3,026.79 = 923.90/x
3. Step 3: Cross multiply
   2,019.42x = 3,026.79 × 923.90
4. Step 4: Simplify right side
   2,019.42x = 2,796,436.15
5. Step 5: Solve for x
   x = 2,796,436.15/2,019.42
6. Step 6: Final answer
   x = 1,384.77