Finding the Fourth Proportional to 1,457.42, 2,010.57 and 859.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,457.42 : 2,010.57 = 859.51 : x
2. Step 2: Convert to fraction form
   1,457.42/2,010.57 = 859.51/x
3. Step 3: Cross multiply
   1,457.42x = 2,010.57 × 859.51
4. Step 4: Simplify right side
   1,457.42x = 1,728,096.77
5. Step 5: Solve for x
   x = 1,728,096.77/1,457.42
6. Step 6: Final answer
   x = 1,185.72