Finding the Fourth Proportional to 2,678.71, 4,018.25 and 923.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.71 : 4,018.25 = 923.89 : x
2. Step 2: Convert to fraction form
   2,678.71/4,018.25 = 923.89/x
3. Step 3: Cross multiply
   2,678.71x = 4,018.25 × 923.89
4. Step 4: Simplify right side
   2,678.71x = 3,712,437.09
5. Step 5: Solve for x
   x = 3,712,437.09/2,678.71
6. Step 6: Final answer
   x = 1,385.90