Finding the Fourth Proportional to 9,406.49, 12,981.20 and 5,317.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,406.49 : 12,981.20 = 5,317.96 : x
2. Step 2: Convert to fraction form
   9,406.49/12,981.20 = 5,317.96/x
3. Step 3: Cross multiply
   9,406.49x = 12,981.20 × 5,317.96
4. Step 4: Simplify right side
   9,406.49x = 69,033,528.16
5. Step 5: Solve for x
   x = 69,033,528.16/9,406.49
6. Step 6: Final answer
   x = 7,338.93