Finding the Fourth Proportional to 2,175.28, 3,003.20 and 1,378.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.28 : 3,003.20 = 1,378.73 : x
2. Step 2: Convert to fraction form
   2,175.28/3,003.20 = 1,378.73/x
3. Step 3: Cross multiply
   2,175.28x = 3,003.20 × 1,378.73
4. Step 4: Simplify right side
   2,175.28x = 4,140,612.89
5. Step 5: Solve for x
   x = 4,140,612.89/2,175.28
6. Step 6: Final answer
   x = 1,903.49