Finding the Fourth Proportional to 8,938.78, 12,333.72 and 5,402.19

Step by Step Solution

1. Step 1: Write the proportion equation
   8,938.78 : 12,333.72 = 5,402.19 : x
2. Step 2: Convert to fraction form
   8,938.78/12,333.72 = 5,402.19/x
3. Step 3: Cross multiply
   8,938.78x = 12,333.72 × 5,402.19
4. Step 4: Simplify right side
   8,938.78x = 66,629,098.85
5. Step 5: Solve for x
   x = 66,629,098.85/8,938.78
6. Step 6: Final answer
   x = 7,453.94