Finding the Fourth Proportional to 1,383.80, 2,076.42 and 896.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.80 : 2,076.42 = 896.72 : x
2. Step 2: Convert to fraction form
   1,383.80/2,076.42 = 896.72/x
3. Step 3: Cross multiply
   1,383.80x = 2,076.42 × 896.72
4. Step 4: Simplify right side
   1,383.80x = 1,861,967.34
5. Step 5: Solve for x
   x = 1,861,967.34/1,383.80
6. Step 6: Final answer
   x = 1,345.55