Finding the Fourth Proportional to 1,728.82, 2,386.86 and 1,066.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.82 : 2,386.86 = 1,066.78 : x
2. Step 2: Convert to fraction form
   1,728.82/2,386.86 = 1,066.78/x
3. Step 3: Cross multiply
   1,728.82x = 2,386.86 × 1,066.78
4. Step 4: Simplify right side
   1,728.82x = 2,546,254.51
5. Step 5: Solve for x
   x = 2,546,254.51/1,728.82
6. Step 6: Final answer
   x = 1,472.83