Finding the Fourth Proportional to 13,113.77, 18,096.77 and 7,145.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,113.77 : 18,096.77 = 7,145.48 : x
2. Step 2: Convert to fraction form
   13,113.77/18,096.77 = 7,145.48/x
3. Step 3: Cross multiply
   13,113.77x = 18,096.77 × 7,145.48
4. Step 4: Simplify right side
   13,113.77x = 129,309,981.89
5. Step 5: Solve for x
   x = 129,309,981.89/13,113.77
6. Step 6: Final answer
   x = 9,860.63