Finding the Fourth Proportional to 13,100.08, 18,084.20 and 7,720.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.08 : 18,084.20 = 7,720.82 : x
2. Step 2: Convert to fraction form
   13,100.08/18,084.20 = 7,720.82/x
3. Step 3: Cross multiply
   13,100.08x = 18,084.20 × 7,720.82
4. Step 4: Simplify right side
   13,100.08x = 139,624,859.65
5. Step 5: Solve for x
   x = 139,624,859.65/13,100.08
6. Step 6: Final answer
   x = 10,658.32