Finding the Fourth Proportional to 1,050.71, 1,575.61 and 320.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.71 : 1,575.61 = 320.12 : x
2. Step 2: Convert to fraction form
   1,050.71/1,575.61 = 320.12/x
3. Step 3: Cross multiply
   1,050.71x = 1,575.61 × 320.12
4. Step 4: Simplify right side
   1,050.71x = 504,375.59
5. Step 5: Solve for x
   x = 504,375.59/1,050.71
6. Step 6: Final answer
   x = 480.03