Finding the Fourth Proportional to 8,920.53, 12,308.56 and 5,383.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920.53 : 12,308.56 = 5,383.94 : x
2. Step 2: Convert to fraction form
   8,920.53/12,308.56 = 5,383.94/x
3. Step 3: Cross multiply
   8,920.53x = 12,308.56 × 5,383.94
4. Step 4: Simplify right side
   8,920.53x = 66,268,473.52
5. Step 5: Solve for x
   x = 66,268,473.52/8,920.53
6. Step 6: Final answer
   x = 7,428.76