Finding the Fourth Proportional to 9,387.15, 12,954.56 and 5,409.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,387.15 : 12,954.56 = 5,409.06 : x
2. Step 2: Convert to fraction form
   9,387.15/12,954.56 = 5,409.06/x
3. Step 3: Cross multiply
   9,387.15x = 12,954.56 × 5,409.06
4. Step 4: Simplify right side
   9,387.15x = 70,071,965.27
5. Step 5: Solve for x
   x = 70,071,965.27/9,387.15
6. Step 6: Final answer
   x = 7,464.67