Finding the Fourth Proportional to 13,087.75, 18,054.07 and 9,101.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.75 : 18,054.07 = 9,101.94 : x
2. Step 2: Convert to fraction form
   13,087.75/18,054.07 = 9,101.94/x
3. Step 3: Cross multiply
   13,087.75x = 18,054.07 × 9,101.94
4. Step 4: Simplify right side
   13,087.75x = 164,327,061.90
5. Step 5: Solve for x
   x = 164,327,061.90/13,087.75
6. Step 6: Final answer
   x = 12,555.79