Finding the Fourth Proportional to 9,354.43, 12,911.32 and 5,377.85

Step by Step Solution

1. Step 1: Write the proportion equation
   9,354.43 : 12,911.32 = 5,377.85 : x
2. Step 2: Convert to fraction form
   9,354.43/12,911.32 = 5,377.85/x
3. Step 3: Cross multiply
   9,354.43x = 12,911.32 × 5,377.85
4. Step 4: Simplify right side
   9,354.43x = 69,435,146.29
5. Step 5: Solve for x
   x = 69,435,146.29/9,354.43
6. Step 6: Final answer
   x = 7,422.71