Finding the Fourth Proportional to 9,333.90, 12,881.07 and 5,355.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,333.90 : 12,881.07 = 5,355.81 : x
2. Step 2: Convert to fraction form
   9,333.90/12,881.07 = 5,355.81/x
3. Step 3: Cross multiply
   9,333.90x = 12,881.07 × 5,355.81
4. Step 4: Simplify right side
   9,333.90x = 68,988,563.52
5. Step 5: Solve for x
   x = 68,988,563.52/9,333.90
6. Step 6: Final answer
   x = 7,391.18