Finding the Fourth Proportional to 1,729.28, 2,385.15 and 1,066.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,729.28 : 2,385.15 = 1,066.43 : x
2. Step 2: Convert to fraction form
   1,729.28/2,385.15 = 1,066.43/x
3. Step 3: Cross multiply
   1,729.28x = 2,385.15 × 1,066.43
4. Step 4: Simplify right side
   1,729.28x = 2,543,583.59
5. Step 5: Solve for x
   x = 2,543,583.59/1,729.28
6. Step 6: Final answer
   x = 1,470.90