Finding the Fourth Proportional to 16,580.48, 22,878.72 and 9,507.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,580.48 : 22,878.72 = 9,507.20 : x
2. Step 2: Convert to fraction form
   16,580.48/22,878.72 = 9,507.20/x
3. Step 3: Cross multiply
   16,580.48x = 22,878.72 × 9,507.20
4. Step 4: Simplify right side
   16,580.48x = 217,512,566.78
5. Step 5: Solve for x
   x = 217,512,566.78/16,580.48
6. Step 6: Final answer
   x = 13,118.59