Finding the Fourth Proportional to 13,262.69, 18,288.61 and 9,900.11

Step by Step Solution

1. Step 1: Write the proportion equation
   13,262.69 : 18,288.61 = 9,900.11 : x
2. Step 2: Convert to fraction form
   13,262.69/18,288.61 = 9,900.11/x
3. Step 3: Cross multiply
   13,262.69x = 18,288.61 × 9,900.11
4. Step 4: Simplify right side
   13,262.69x = 181,059,134.55
5. Step 5: Solve for x
   x = 181,059,134.55/13,262.69
6. Step 6: Final answer
   x = 13,651.77