Finding the Fourth Proportional to 1,728.57, 2,385.42 and 942.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.57 : 2,385.42 = 942.63 : x
2. Step 2: Convert to fraction form
   1,728.57/2,385.42 = 942.63/x
3. Step 3: Cross multiply
   1,728.57x = 2,385.42 × 942.63
4. Step 4: Simplify right side
   1,728.57x = 2,248,568.45
5. Step 5: Solve for x
   x = 2,248,568.45/1,728.57
6. Step 6: Final answer
   x = 1,300.83