Finding the Fourth Proportional to 1,728.20, 2,384.84 and 942.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.20 : 2,384.84 = 942.25 : x
2. Step 2: Convert to fraction form
   1,728.20/2,384.84 = 942.25/x
3. Step 3: Cross multiply
   1,728.20x = 2,384.84 × 942.25
4. Step 4: Simplify right side
   1,728.20x = 2,247,111.88
5. Step 5: Solve for x
   x = 2,247,111.88/1,728.20
6. Step 6: Final answer
   x = 1,300.27