Finding the Fourth Proportional to 9,356.08, 12,911.28 and 5,376.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,356.08 : 12,911.28 = 5,376.89 : x
2. Step 2: Convert to fraction form
   9,356.08/12,911.28 = 5,376.89/x
3. Step 3: Cross multiply
   9,356.08x = 12,911.28 × 5,376.89
4. Step 4: Simplify right side
   9,356.08x = 69,422,447.60
5. Step 5: Solve for x
   x = 69,422,447.60/9,356.08
6. Step 6: Final answer
   x = 7,420.04