Finding the Fourth Proportional to 1,069.50, 1,604.21 and 300.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.50 : 1,604.21 = 300.00 : x
2. Step 2: Convert to fraction form
   1,069.50/1,604.21 = 300.00/x
3. Step 3: Cross multiply
   1,069.50x = 1,604.21 × 300.00
4. Step 4: Simplify right side
   1,069.50x = 481,267.52
5. Step 5: Solve for x
   x = 481,267.52/1,069.50
6. Step 6: Final answer
   x = 449.99