Finding the Fourth Proportional to 13,131.36, 19,706.76 and 6,210.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.36 : 19,706.76 = 6,210.72 : x
2. Step 2: Convert to fraction form
   13,131.36/19,706.76 = 6,210.72/x
3. Step 3: Cross multiply
   13,131.36x = 19,706.76 × 6,210.72
4. Step 4: Simplify right side
   13,131.36x = 122,393,168.47
5. Step 5: Solve for x
   x = 122,393,168.47/13,131.36
6. Step 6: Final answer
   x = 9,320.68