Finding the Fourth Proportional to 1,384.89, 1,911.15 and 755.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.89 : 1,911.15 = 755.42 : x
2. Step 2: Convert to fraction form
   1,384.89/1,911.15 = 755.42/x
3. Step 3: Cross multiply
   1,384.89x = 1,911.15 × 755.42
4. Step 4: Simplify right side
   1,384.89x = 1,443,711.38
5. Step 5: Solve for x
   x = 1,443,711.38/1,384.89
6. Step 6: Final answer
   x = 1,042.47