Finding the Fourth Proportional to 13,395.16, 18,485.01 and 7,426.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,395.16 : 18,485.01 = 7,426.78 : x
2. Step 2: Convert to fraction form
   13,395.16/18,485.01 = 7,426.78/x
3. Step 3: Cross multiply
   13,395.16x = 18,485.01 × 7,426.78
4. Step 4: Simplify right side
   13,395.16x = 137,284,102.57
5. Step 5: Solve for x
   x = 137,284,102.57/13,395.16
6. Step 6: Final answer
   x = 10,248.78