Finding the Fourth Proportional to 13,089.52, 18,067.61 and 7,428.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,089.52 : 18,067.61 = 7,428.04 : x
2. Step 2: Convert to fraction form
   13,089.52/18,067.61 = 7,428.04/x
3. Step 3: Cross multiply
   13,089.52x = 18,067.61 × 7,428.04
4. Step 4: Simplify right side
   13,089.52x = 134,206,903.19
5. Step 5: Solve for x
   x = 134,206,903.19/13,089.52
6. Step 6: Final answer
   x = 10,253.00