Finding the Fourth Proportional to 1,053.56, 1,580.50 and 322.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.56 : 1,580.50 = 322.98 : x
2. Step 2: Convert to fraction form
   1,053.56/1,580.50 = 322.98/x
3. Step 3: Cross multiply
   1,053.56x = 1,580.50 × 322.98
4. Step 4: Simplify right side
   1,053.56x = 510,469.89
5. Step 5: Solve for x
   x = 510,469.89/1,053.56
6. Step 6: Final answer
   x = 484.52