Finding the Fourth Proportional to 13,395.20, 18,484.69 and 7,426.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,395.20 : 18,484.69 = 7,426.81 : x
2. Step 2: Convert to fraction form
   13,395.20/18,484.69 = 7,426.81/x
3. Step 3: Cross multiply
   13,395.20x = 18,484.69 × 7,426.81
4. Step 4: Simplify right side
   13,395.20x = 137,282,150.98
5. Step 5: Solve for x
   x = 137,282,150.98/13,395.20
6. Step 6: Final answer
   x = 10,248.61