Finding the Fourth Proportional to 10,513.67, 15,738.18 and 9,018.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,513.67 : 15,738.18 = 9,018.99 : x
2. Step 2: Convert to fraction form
   10,513.67/15,738.18 = 9,018.99/x
3. Step 3: Cross multiply
   10,513.67x = 15,738.18 × 9,018.99
4. Step 4: Simplify right side
   10,513.67x = 141,942,488.04
5. Step 5: Solve for x
   x = 141,942,488.04/10,513.67
6. Step 6: Final answer
   x = 13,500.76