Finding the Fourth Proportional to 13,058.88, 18,018.72 and 7,755.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,058.88 : 18,018.72 = 7,755.36 : x
2. Step 2: Convert to fraction form
   13,058.88/18,018.72 = 7,755.36/x
3. Step 3: Cross multiply
   13,058.88x = 18,018.72 × 7,755.36
4. Step 4: Simplify right side
   13,058.88x = 139,741,660.34
5. Step 5: Solve for x
   x = 139,741,660.34/13,058.88
6. Step 6: Final answer
   x = 10,700.89