Finding the Fourth Proportional to 9,885.58, 13,642.08 and 5,409.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,885.58 : 13,642.08 = 5,409.32 : x
2. Step 2: Convert to fraction form
   9,885.58/13,642.08 = 5,409.32/x
3. Step 3: Cross multiply
   9,885.58x = 13,642.08 × 5,409.32
4. Step 4: Simplify right side
   9,885.58x = 73,794,287.69
5. Step 5: Solve for x
   x = 73,794,287.69/9,885.58
6. Step 6: Final answer
   x = 7,464.84