Finding the Fourth Proportional to 1,457.34, 2,185.63 and 726.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,457.34 : 2,185.63 = 726.38 : x
2. Step 2: Convert to fraction form
   1,457.34/2,185.63 = 726.38/x
3. Step 3: Cross multiply
   1,457.34x = 2,185.63 × 726.38
4. Step 4: Simplify right side
   1,457.34x = 1,587,597.92
5. Step 5: Solve for x
   x = 1,587,597.92/1,457.34
6. Step 6: Final answer
   x = 1,089.38