Finding the Fourth Proportional to 2,269.31, 3,131.80 and 1,384.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.31 : 3,131.80 = 1,384.88 : x
2. Step 2: Convert to fraction form
   2,269.31/3,131.80 = 1,384.88/x
3. Step 3: Cross multiply
   2,269.31x = 3,131.80 × 1,384.88
4. Step 4: Simplify right side
   2,269.31x = 4,337,148.06
5. Step 5: Solve for x
   x = 4,337,148.06/2,269.31
6. Step 6: Final answer
   x = 1,911.22