Finding the Fourth Proportional to 2,269.42, 3,131.25 and 1,384.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.42 : 3,131.25 = 1,384.90 : x
2. Step 2: Convert to fraction form
   2,269.42/3,131.25 = 1,384.90/x
3. Step 3: Cross multiply
   2,269.42x = 3,131.25 × 1,384.90
4. Step 4: Simplify right side
   2,269.42x = 4,336,468.13
5. Step 5: Solve for x
   x = 4,336,468.13/2,269.42
6. Step 6: Final answer
   x = 1,910.83