Finding the Fourth Proportional to 2,269.16, 3,131.77 and 1,385.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.16 : 3,131.77 = 1,385.47 : x
2. Step 2: Convert to fraction form
   2,269.16/3,131.77 = 1,385.47/x
3. Step 3: Cross multiply
   2,269.16x = 3,131.77 × 1,385.47
4. Step 4: Simplify right side
   2,269.16x = 4,338,976.85
5. Step 5: Solve for x
   x = 4,338,976.85/2,269.16
6. Step 6: Final answer
   x = 1,912.16