Finding the Fourth Proportional to 1,322.08, 1,984.56 and 553.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.08 : 1,984.56 = 553.12 : x
2. Step 2: Convert to fraction form
   1,322.08/1,984.56 = 553.12/x
3. Step 3: Cross multiply
   1,322.08x = 1,984.56 × 553.12
4. Step 4: Simplify right side
   1,322.08x = 1,097,699.83
5. Step 5: Solve for x
   x = 1,097,699.83/1,322.08
6. Step 6: Final answer
   x = 830.28