Finding the Fourth Proportional to 1,384.65, 1,908.63 and 1,089.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.65 : 1,908.63 = 1,089.54 : x
2. Step 2: Convert to fraction form
   1,384.65/1,908.63 = 1,089.54/x
3. Step 3: Cross multiply
   1,384.65x = 1,908.63 × 1,089.54
4. Step 4: Simplify right side
   1,384.65x = 2,079,528.73
5. Step 5: Solve for x
   x = 2,079,528.73/1,384.65
6. Step 6: Final answer
   x = 1,501.84