Finding the Fourth Proportional to 13,499.58, 20,231.10 and 5,171.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.58 : 20,231.10 = 5,171.94 : x
2. Step 2: Convert to fraction form
   13,499.58/20,231.10 = 5,171.94/x
3. Step 3: Cross multiply
   13,499.58x = 20,231.10 × 5,171.94
4. Step 4: Simplify right side
   13,499.58x = 104,634,035.33
5. Step 5: Solve for x
   x = 104,634,035.33/13,499.58
6. Step 6: Final answer
   x = 7,750.91