Finding the Fourth Proportional to 9,388.16, 12,955.62 and 5,409.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.16 : 12,955.62 = 5,409.98 : x
2. Step 2: Convert to fraction form
   9,388.16/12,955.62 = 5,409.98/x
3. Step 3: Cross multiply
   9,388.16x = 12,955.62 × 5,409.98
4. Step 4: Simplify right side
   9,388.16x = 70,089,645.09
5. Step 5: Solve for x
   x = 70,089,645.09/9,388.16
6. Step 6: Final answer
   x = 7,465.75