Finding the Fourth Proportional to 9,386.89, 12,954.80 and 5,408.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,386.89 : 12,954.80 = 5,408.84 : x
2. Step 2: Convert to fraction form
   9,386.89/12,954.80 = 5,408.84/x
3. Step 3: Cross multiply
   9,386.89x = 12,954.80 × 5,408.84
4. Step 4: Simplify right side
   9,386.89x = 70,070,440.43
5. Step 5: Solve for x
   x = 70,070,440.43/9,386.89
6. Step 6: Final answer
   x = 7,464.71