Finding the Fourth Proportional to 13,059.36, 18,020.86 and 7,755.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,059.36 : 18,020.86 = 7,755.48 : x
2. Step 2: Convert to fraction form
   13,059.36/18,020.86 = 7,755.48/x
3. Step 3: Cross multiply
   13,059.36x = 18,020.86 × 7,755.48
4. Step 4: Simplify right side
   13,059.36x = 139,760,419.31
5. Step 5: Solve for x
   x = 139,760,419.31/13,059.36
6. Step 6: Final answer
   x = 10,701.93