Finding the Fourth Proportional to 9,013.72, 13,505.08 and 8,100.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,013.72 : 13,505.08 = 8,100.68 : x
2. Step 2: Convert to fraction form
   9,013.72/13,505.08 = 8,100.68/x
3. Step 3: Cross multiply
   9,013.72x = 13,505.08 × 8,100.68
4. Step 4: Simplify right side
   9,013.72x = 109,400,331.45
5. Step 5: Solve for x
   x = 109,400,331.45/9,013.72
6. Step 6: Final answer
   x = 12,137.09