Finding the Fourth Proportional to 13,406.55, 18,498.27 and 7,741.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,406.55 : 18,498.27 = 7,741.20 : x
2. Step 2: Convert to fraction form
   13,406.55/18,498.27 = 7,741.20/x
3. Step 3: Cross multiply
   13,406.55x = 18,498.27 × 7,741.20
4. Step 4: Simplify right side
   13,406.55x = 143,198,807.72
5. Step 5: Solve for x
   x = 143,198,807.72/13,406.55
6. Step 6: Final answer
   x = 10,681.26