Finding the Fourth Proportional to 2,592.49, 3,888.73 and 644.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,592.49 : 3,888.73 = 644.69 : x
2. Step 2: Convert to fraction form
   2,592.49/3,888.73 = 644.69/x
3. Step 3: Cross multiply
   2,592.49x = 3,888.73 × 644.69
4. Step 4: Simplify right side
   2,592.49x = 2,507,025.34
5. Step 5: Solve for x
   x = 2,507,025.34/2,592.49
6. Step 6: Final answer
   x = 967.03