Finding the Fourth Proportional to 1,729.14, 2,385.34 and 1,139.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,729.14 : 2,385.34 = 1,139.46 : x
2. Step 2: Convert to fraction form
   1,729.14/2,385.34 = 1,139.46/x
3. Step 3: Cross multiply
   1,729.14x = 2,385.34 × 1,139.46
4. Step 4: Simplify right side
   1,729.14x = 2,717,999.52
5. Step 5: Solve for x
   x = 2,717,999.52/1,729.14
6. Step 6: Final answer
   x = 1,571.88