Finding the Fourth Proportional to 13,449.61, 18,561.38 and 7,481.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,449.61 : 18,561.38 = 7,481.83 : x
2. Step 2: Convert to fraction form
   13,449.61/18,561.38 = 7,481.83/x
3. Step 3: Cross multiply
   13,449.61x = 18,561.38 × 7,481.83
4. Step 4: Simplify right side
   13,449.61x = 138,873,089.73
5. Step 5: Solve for x
   x = 138,873,089.73/13,449.61
6. Step 6: Final answer
   x = 10,325.44