Finding the Fourth Proportional to 1,382.16, 1,905.48 and 1,103.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.16 : 1,905.48 = 1,103.34 : x
2. Step 2: Convert to fraction form
   1,382.16/1,905.48 = 1,103.34/x
3. Step 3: Cross multiply
   1,382.16x = 1,905.48 × 1,103.34
4. Step 4: Simplify right side
   1,382.16x = 2,102,392.30
5. Step 5: Solve for x
   x = 2,102,392.30/1,382.16
6. Step 6: Final answer
   x = 1,521.09