Finding the Fourth Proportional to 2,621.78, 3,932.23 and 673.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.78 : 3,932.23 = 673.98 : x
2. Step 2: Convert to fraction form
   2,621.78/3,932.23 = 673.98/x
3. Step 3: Cross multiply
   2,621.78x = 3,932.23 × 673.98
4. Step 4: Simplify right side
   2,621.78x = 2,650,244.38
5. Step 5: Solve for x
   x = 2,650,244.38/2,621.78
6. Step 6: Final answer
   x = 1,010.86