Finding the Fourth Proportional to 13,647.98, 18,835.32 and 7,679.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,647.98 : 18,835.32 = 7,679.30 : x
2. Step 2: Convert to fraction form
   13,647.98/18,835.32 = 7,679.30/x
3. Step 3: Cross multiply
   13,647.98x = 18,835.32 × 7,679.30
4. Step 4: Simplify right side
   13,647.98x = 144,642,072.88
5. Step 5: Solve for x
   x = 144,642,072.88/13,647.98
6. Step 6: Final answer
   x = 10,598.06