Finding the Fourth Proportional to 13,301.76, 18,356.22 and 7,636.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,301.76 : 18,356.22 = 7,636.62 : x
2. Step 2: Convert to fraction form
   13,301.76/18,356.22 = 7,636.62/x
3. Step 3: Cross multiply
   13,301.76x = 18,356.22 × 7,636.62
4. Step 4: Simplify right side
   13,301.76x = 140,179,476.78
5. Step 5: Solve for x
   x = 140,179,476.78/13,301.76
6. Step 6: Final answer
   x = 10,538.42