Finding the Fourth Proportional to 1,385.16, 1,911.52 and 755.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.16 : 1,911.52 = 755.68 : x
2. Step 2: Convert to fraction form
   1,385.16/1,911.52 = 755.68/x
3. Step 3: Cross multiply
   1,385.16x = 1,911.52 × 755.68
4. Step 4: Simplify right side
   1,385.16x = 1,444,484.10
5. Step 5: Solve for x
   x = 1,444,484.10/1,385.16
6. Step 6: Final answer
   x = 1,042.83