Finding the Fourth Proportional to 13,679.58, 18,877.82 and 7,391.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,679.58 : 18,877.82 = 7,391.96 : x
2. Step 2: Convert to fraction form
   13,679.58/18,877.82 = 7,391.96/x
3. Step 3: Cross multiply
   13,679.58x = 18,877.82 × 7,391.96
4. Step 4: Simplify right side
   13,679.58x = 139,544,090.33
5. Step 5: Solve for x
   x = 139,544,090.33/13,679.58
6. Step 6: Final answer
   x = 10,200.90