Finding the Fourth Proportional to 1,383.42, 2,084.51 and 1,145.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.42 : 2,084.51 = 1,145.28 : x
2. Step 2: Convert to fraction form
   1,383.42/2,084.51 = 1,145.28/x
3. Step 3: Cross multiply
   1,383.42x = 2,084.51 × 1,145.28
4. Step 4: Simplify right side
   1,383.42x = 2,387,347.61
5. Step 5: Solve for x
   x = 2,387,347.61/1,383.42
6. Step 6: Final answer
   x = 1,725.69