Finding the Fourth Proportional to 9,354.43, 12,908.94 and 5,105.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,354.43 : 12,908.94 = 5,105.35 : x
2. Step 2: Convert to fraction form
   9,354.43/12,908.94 = 5,105.35/x
3. Step 3: Cross multiply
   9,354.43x = 12,908.94 × 5,105.35
4. Step 4: Simplify right side
   9,354.43x = 65,904,656.83
5. Step 5: Solve for x
   x = 65,904,656.83/9,354.43
6. Step 6: Final answer
   x = 7,045.29