Finding the Fourth Proportional to 1,315.42, 1,815.29 and 725.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.42 : 1,815.29 = 725.95 : x
2. Step 2: Convert to fraction form
   1,315.42/1,815.29 = 725.95/x
3. Step 3: Cross multiply
   1,315.42x = 1,815.29 × 725.95
4. Step 4: Simplify right side
   1,315.42x = 1,317,809.78
5. Step 5: Solve for x
   x = 1,317,809.78/1,315.42
6. Step 6: Final answer
   x = 1,001.82