Finding the Fourth Proportional to 1,315.63, 1,815.48 and 726.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.63 : 1,815.48 = 726.04 : x
2. Step 2: Convert to fraction form
   1,315.63/1,815.48 = 726.04/x
3. Step 3: Cross multiply
   1,315.63x = 1,815.48 × 726.04
4. Step 4: Simplify right side
   1,315.63x = 1,318,111.10
5. Step 5: Solve for x
   x = 1,318,111.10/1,315.63
6. Step 6: Final answer
   x = 1,001.89