Finding the Fourth Proportional to 13,148.80, 18,143.22 and 7,558.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,148.80 : 18,143.22 = 7,558.72 : x
2. Step 2: Convert to fraction form
   13,148.80/18,143.22 = 7,558.72/x
3. Step 3: Cross multiply
   13,148.80x = 18,143.22 × 7,558.72
4. Step 4: Simplify right side
   13,148.80x = 137,139,519.88
5. Step 5: Solve for x
   x = 137,139,519.88/13,148.80
6. Step 6: Final answer
   x = 10,429.81