Finding the Fourth Proportional to 1,921.10, 2,650.29 and 1,478.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.10 : 2,650.29 = 1,478.30 : x
2. Step 2: Convert to fraction form
   1,921.10/2,650.29 = 1,478.30/x
3. Step 3: Cross multiply
   1,921.10x = 2,650.29 × 1,478.30
4. Step 4: Simplify right side
   1,921.10x = 3,917,923.71
5. Step 5: Solve for x
   x = 3,917,923.71/1,921.10
6. Step 6: Final answer
   x = 2,039.42