Finding the Fourth Proportional to 1,384.69, 1,910.82 and 755.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.69 : 1,910.82 = 755.20 : x
2. Step 2: Convert to fraction form
   1,384.69/1,910.82 = 755.20/x
3. Step 3: Cross multiply
   1,384.69x = 1,910.82 × 755.20
4. Step 4: Simplify right side
   1,384.69x = 1,443,051.26
5. Step 5: Solve for x
   x = 1,443,051.26/1,384.69
6. Step 6: Final answer
   x = 1,042.15