Finding the Fourth Proportional to 1,053.72, 1,579.83 and 322.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.72 : 1,579.83 = 322.91 : x
2. Step 2: Convert to fraction form
   1,053.72/1,579.83 = 322.91/x
3. Step 3: Cross multiply
   1,053.72x = 1,579.83 × 322.91
4. Step 4: Simplify right side
   1,053.72x = 510,135.01
5. Step 5: Solve for x
   x = 510,135.01/1,053.72
6. Step 6: Final answer
   x = 484.13