Finding the Fourth Proportional to 1,050.72, 1,576.15 and 357.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.72 : 1,576.15 = 357.20 : x
2. Step 2: Convert to fraction form
   1,050.72/1,576.15 = 357.20/x
3. Step 3: Cross multiply
   1,050.72x = 1,576.15 × 357.20
4. Step 4: Simplify right side
   1,050.72x = 562,992.01
5. Step 5: Solve for x
   x = 562,992.01/1,050.72
6. Step 6: Final answer
   x = 535.82