Finding the Fourth Proportional to 2,380.69, 3,571.13 and 649.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.69 : 3,571.13 = 649.31 : x
2. Step 2: Convert to fraction form
   2,380.69/3,571.13 = 649.31/x
3. Step 3: Cross multiply
   2,380.69x = 3,571.13 × 649.31
4. Step 4: Simplify right side
   2,380.69x = 2,318,770.42
5. Step 5: Solve for x
   x = 2,318,770.42/2,380.69
6. Step 6: Final answer
   x = 973.99