Finding the Fourth Proportional to 13,288.45, 18,338.06 and 7,320.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,288.45 : 18,338.06 = 7,320.10 : x
2. Step 2: Convert to fraction form
   13,288.45/18,338.06 = 7,320.10/x
3. Step 3: Cross multiply
   13,288.45x = 18,338.06 × 7,320.10
4. Step 4: Simplify right side
   13,288.45x = 134,236,433.01
5. Step 5: Solve for x
   x = 134,236,433.01/13,288.45
6. Step 6: Final answer
   x = 10,101.74