Finding the Fourth Proportional to 1,728.09, 2,384.78 and 942.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.09 : 2,384.78 = 942.15 : x
2. Step 2: Convert to fraction form
   1,728.09/2,384.78 = 942.15/x
3. Step 3: Cross multiply
   1,728.09x = 2,384.78 × 942.15
4. Step 4: Simplify right side
   1,728.09x = 2,246,815.77
5. Step 5: Solve for x
   x = 2,246,815.77/1,728.09
6. Step 6: Final answer
   x = 1,300.17