Finding the Fourth Proportional to 1,408.32, 1,942.30 and 1,055.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.32 : 1,942.30 = 1,055.07 : x
2. Step 2: Convert to fraction form
   1,408.32/1,942.30 = 1,055.07/x
3. Step 3: Cross multiply
   1,408.32x = 1,942.30 × 1,055.07
4. Step 4: Simplify right side
   1,408.32x = 2,049,260.81
5. Step 5: Solve for x
   x = 2,049,260.81/1,408.32
6. Step 6: Final answer
   x = 1,455.11