Finding the Fourth Proportional to 1,406.19, 1,939.54 and 1,074.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.19 : 1,939.54 = 1,074.05 : x
2. Step 2: Convert to fraction form
   1,406.19/1,939.54 = 1,074.05/x
3. Step 3: Cross multiply
   1,406.19x = 1,939.54 × 1,074.05
4. Step 4: Simplify right side
   1,406.19x = 2,083,150.55
5. Step 5: Solve for x
   x = 2,083,150.55/1,406.19
6. Step 6: Final answer
   x = 1,481.41