Finding the Fourth Proportional to 15,453.32, 21,328.72 and 9,169.34

Step by Step Solution

1. Step 1: Write the proportion equation
   15,453.32 : 21,328.72 = 9,169.34 : x
2. Step 2: Convert to fraction form
   15,453.32/21,328.72 = 9,169.34/x
3. Step 3: Cross multiply
   15,453.32x = 21,328.72 × 9,169.34
4. Step 4: Simplify right side
   15,453.32x = 195,570,155.88
5. Step 5: Solve for x
   x = 195,570,155.88/15,453.32
6. Step 6: Final answer
   x = 12,655.55