Finding the Fourth Proportional to 2,152.19, 3,229.50 and 919.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.19 : 3,229.50 = 919.47 : x
2. Step 2: Convert to fraction form
   2,152.19/3,229.50 = 919.47/x
3. Step 3: Cross multiply
   2,152.19x = 3,229.50 × 919.47
4. Step 4: Simplify right side
   2,152.19x = 2,969,428.37
5. Step 5: Solve for x
   x = 2,969,428.37/2,152.19
6. Step 6: Final answer
   x = 1,379.73