Finding the Fourth Proportional to 1,729.17, 2,386.69 and 1,066.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,729.17 : 2,386.69 = 1,066.57 : x
2. Step 2: Convert to fraction form
   1,729.17/2,386.69 = 1,066.57/x
3. Step 3: Cross multiply
   1,729.17x = 2,386.69 × 1,066.57
4. Step 4: Simplify right side
   1,729.17x = 2,545,563.32
5. Step 5: Solve for x
   x = 2,545,563.32/1,729.17
6. Step 6: Final answer
   x = 1,472.13