Finding the Fourth Proportional to 2,457.16, 3,685.72 and 725.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,457.16 : 3,685.72 = 725.76 : x
2. Step 2: Convert to fraction form
   2,457.16/3,685.72 = 725.76/x
3. Step 3: Cross multiply
   2,457.16x = 3,685.72 × 725.76
4. Step 4: Simplify right side
   2,457.16x = 2,674,948.15
5. Step 5: Solve for x
   x = 2,674,948.15/2,457.16
6. Step 6: Final answer
   x = 1,088.63