Finding the Fourth Proportional to 1,815.30, 2,721.06 and 704.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.30 : 2,721.06 = 704.43 : x
2. Step 2: Convert to fraction form
   1,815.30/2,721.06 = 704.43/x
3. Step 3: Cross multiply
   1,815.30x = 2,721.06 × 704.43
4. Step 4: Simplify right side
   1,815.30x = 1,916,796.30
5. Step 5: Solve for x
   x = 1,916,796.30/1,815.30
6. Step 6: Final answer
   x = 1,055.91