Finding the Fourth Proportional to 13,242.87, 18,291.33 and 9,900.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,242.87 : 18,291.33 = 9,900.52 : x
2. Step 2: Convert to fraction form
   13,242.87/18,291.33 = 9,900.52/x
3. Step 3: Cross multiply
   13,242.87x = 18,291.33 × 9,900.52
4. Step 4: Simplify right side
   13,242.87x = 181,093,632.76
5. Step 5: Solve for x
   x = 181,093,632.76/13,242.87
6. Step 6: Final answer
   x = 13,674.80