Finding the Fourth Proportional to 2,678.95, 4,019.09 and 923.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.95 : 4,019.09 = 923.98 : x
2. Step 2: Convert to fraction form
   2,678.95/4,019.09 = 923.98/x
3. Step 3: Cross multiply
   2,678.95x = 4,019.09 × 923.98
4. Step 4: Simplify right side
   2,678.95x = 3,713,558.78
5. Step 5: Solve for x
   x = 3,713,558.78/2,678.95
6. Step 6: Final answer
   x = 1,386.20