Finding the Fourth Proportional to 1,384.65, 1,909.51 and 1,069.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.65 : 1,909.51 = 1,069.41 : x
2. Step 2: Convert to fraction form
   1,384.65/1,909.51 = 1,069.41/x
3. Step 3: Cross multiply
   1,384.65x = 1,909.51 × 1,069.41
4. Step 4: Simplify right side
   1,384.65x = 2,042,053.58
5. Step 5: Solve for x
   x = 2,042,053.58/1,384.65
6. Step 6: Final answer
   x = 1,474.78