Finding the Fourth Proportional to 12,648.33, 18,973.31 and 5,253.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.33 : 18,973.31 = 5,253.39 : x
2. Step 2: Convert to fraction form
   12,648.33/18,973.31 = 5,253.39/x
3. Step 3: Cross multiply
   12,648.33x = 18,973.31 × 5,253.39
4. Step 4: Simplify right side
   12,648.33x = 99,674,170.75
5. Step 5: Solve for x
   x = 99,674,170.75/12,648.33
6. Step 6: Final answer
   x = 7,880.42