Finding the Fourth Proportional to 13,300.28, 18,354.66 and 7,636.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,300.28 : 18,354.66 = 7,636.78 : x
2. Step 2: Convert to fraction form
   13,300.28/18,354.66 = 7,636.78/x
3. Step 3: Cross multiply
   13,300.28x = 18,354.66 × 7,636.78
4. Step 4: Simplify right side
   13,300.28x = 140,170,500.39
5. Step 5: Solve for x
   x = 140,170,500.39/13,300.28
6. Step 6: Final answer
   x = 10,538.91