Finding the Fourth Proportional to 13,104.72, 18,084.84 and 7,136.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,104.72 : 18,084.84 = 7,136.72 : x
2. Step 2: Convert to fraction form
   13,104.72/18,084.84 = 7,136.72/x
3. Step 3: Cross multiply
   13,104.72x = 18,084.84 × 7,136.72
4. Step 4: Simplify right side
   13,104.72x = 129,066,439.32
5. Step 5: Solve for x
   x = 129,066,439.32/13,104.72
6. Step 6: Final answer
   x = 9,848.85