Finding the Fourth Proportional to 1,050.35, 1,575.50 and 320.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.35 : 1,575.50 = 320.00 : x
2. Step 2: Convert to fraction form
   1,050.35/1,575.50 = 320.00/x
3. Step 3: Cross multiply
   1,050.35x = 1,575.50 × 320.00
4. Step 4: Simplify right side
   1,050.35x = 504,150.52
5. Step 5: Solve for x
   x = 504,150.52/1,050.35
6. Step 6: Final answer
   x = 479.99