Finding the Fourth Proportional to 2,176.40, 3,003.72 and 1,478

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.40 : 3,003.72 = 1,478 : x
2. Step 2: Convert to fraction form
   2,176.40/3,003.72 = 1,478/x
3. Step 3: Cross multiply
   2,176.40x = 3,003.72 × 1,478
4. Step 4: Simplify right side
   2,176.40x = 4,439,498.16
5. Step 5: Solve for x
   x = 4,439,498.16/2,176.40
6. Step 6: Final answer
   x = 2,039.84