Finding the Fourth Proportional to 2,623.10, 3,933.82 and 867.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.10 : 3,933.82 = 867.78 : x
2. Step 2: Convert to fraction form
   2,623.10/3,933.82 = 867.78/x
3. Step 3: Cross multiply
   2,623.10x = 3,933.82 × 867.78
4. Step 4: Simplify right side
   2,623.10x = 3,413,666.31
5. Step 5: Solve for x
   x = 3,413,666.31/2,623.10
6. Step 6: Final answer
   x = 1,301.39