Finding the Fourth Proportional to 2,577.72, 3,866.55 and 629.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.72 : 3,866.55 = 629.89 : x
2. Step 2: Convert to fraction form
   2,577.72/3,866.55 = 629.89/x
3. Step 3: Cross multiply
   2,577.72x = 3,866.55 × 629.89
4. Step 4: Simplify right side
   2,577.72x = 2,435,501.18
5. Step 5: Solve for x
   x = 2,435,501.18/2,577.72
6. Step 6: Final answer
   x = 944.83