Finding the Fourth Proportional to 13,393.10, 18,483.57 and 7,426.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,393.10 : 18,483.57 = 7,426.64 : x
2. Step 2: Convert to fraction form
   13,393.10/18,483.57 = 7,426.64/x
3. Step 3: Cross multiply
   13,393.10x = 18,483.57 × 7,426.64
4. Step 4: Simplify right side
   13,393.10x = 137,270,820.30
5. Step 5: Solve for x
   x = 137,270,820.30/13,393.10
6. Step 6: Final answer
   x = 10,249.37