Finding the Fourth Proportional to 13,447.58, 18,557.61 and 7,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,447.58 : 18,557.61 = 7,479.50 : x
2. Step 2: Convert to fraction form
   13,447.58/18,557.61 = 7,479.50/x
3. Step 3: Cross multiply
   13,447.58x = 18,557.61 × 7,479.50
4. Step 4: Simplify right side
   13,447.58x = 138,801,644.00
5. Step 5: Solve for x
   x = 138,801,644.00/13,447.58
6. Step 6: Final answer
   x = 10,321.68