Finding the Fourth Proportional to 2,269.21, 3,131.63 and 1,384.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.21 : 3,131.63 = 1,384.75 : x
2. Step 2: Convert to fraction form
   2,269.21/3,131.63 = 1,384.75/x
3. Step 3: Cross multiply
   2,269.21x = 3,131.63 × 1,384.75
4. Step 4: Simplify right side
   2,269.21x = 4,336,517.72
5. Step 5: Solve for x
   x = 4,336,517.72/2,269.21
6. Step 6: Final answer
   x = 1,911.03