Finding the Fourth Proportional to 13,100.72, 19,644.53 and 6,530.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.72 : 19,644.53 = 6,530.54 : x
2. Step 2: Convert to fraction form
   13,100.72/19,644.53 = 6,530.54/x
3. Step 3: Cross multiply
   13,100.72x = 19,644.53 × 6,530.54
4. Step 4: Simplify right side
   13,100.72x = 128,289,258.07
5. Step 5: Solve for x
   x = 128,289,258.07/13,100.72
6. Step 6: Final answer
   x = 9,792.54