Finding the Fourth Proportional to 2,381.82, 3,571.47 and 919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.82 : 3,571.47 = 919.50 : x
2. Step 2: Convert to fraction form
   2,381.82/3,571.47 = 919.50/x
3. Step 3: Cross multiply
   2,381.82x = 3,571.47 × 919.50
4. Step 4: Simplify right side
   2,381.82x = 3,283,966.67
5. Step 5: Solve for x
   x = 3,283,966.67/2,381.82
6. Step 6: Final answer
   x = 1,378.76