Finding the Fourth Proportional to 15,453.69, 21,326.04 and 8,380.10

Step by Step Solution

1. Step 1: Write the proportion equation
   15,453.69 : 21,326.04 = 8,380.10 : x
2. Step 2: Convert to fraction form
   15,453.69/21,326.04 = 8,380.10/x
3. Step 3: Cross multiply
   15,453.69x = 21,326.04 × 8,380.10
4. Step 4: Simplify right side
   15,453.69x = 178,714,241.17
5. Step 5: Solve for x
   x = 178,714,241.17/15,453.69
6. Step 6: Final answer
   x = 11,564.50