Finding the Fourth Proportional to 2,385.70, 3,578 and 1,152.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.70 : 3,578 = 1,152.34 : x
2. Step 2: Convert to fraction form
   2,385.70/3,578 = 1,152.34/x
3. Step 3: Cross multiply
   2,385.70x = 3,578 × 1,152.34
4. Step 4: Simplify right side
   2,385.70x = 4,123,072.52
5. Step 5: Solve for x
   x = 4,123,072.52/2,385.70
6. Step 6: Final answer
   x = 1,728.24