Finding the Fourth Proportional to 9,385.03, 12,954.23 and 5,408.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,385.03 : 12,954.23 = 5,408.79 : x
2. Step 2: Convert to fraction form
   9,385.03/12,954.23 = 5,408.79/x
3. Step 3: Cross multiply
   9,385.03x = 12,954.23 × 5,408.79
4. Step 4: Simplify right side
   9,385.03x = 70,066,682.64
5. Step 5: Solve for x
   x = 70,066,682.64/9,385.03
6. Step 6: Final answer
   x = 7,465.79