Finding the Fourth Proportional to 13,299.40, 18,354.83 and 7,635.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,299.40 : 18,354.83 = 7,635.92 : x
2. Step 2: Convert to fraction form
   13,299.40/18,354.83 = 7,635.92/x
3. Step 3: Cross multiply
   13,299.40x = 18,354.83 × 7,635.92
4. Step 4: Simplify right side
   13,299.40x = 140,155,981.01
5. Step 5: Solve for x
   x = 140,155,981.01/13,299.40
6. Step 6: Final answer
   x = 10,538.52