Finding the Fourth Proportional to 1,383.93, 1,908.54 and 1,030.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.93 : 1,908.54 = 1,030.72 : x
2. Step 2: Convert to fraction form
   1,383.93/1,908.54 = 1,030.72/x
3. Step 3: Cross multiply
   1,383.93x = 1,908.54 × 1,030.72
4. Step 4: Simplify right side
   1,383.93x = 1,967,160.89
5. Step 5: Solve for x
   x = 1,967,160.89/1,383.93
6. Step 6: Final answer
   x = 1,421.43