Finding the Fourth Proportional to 13,086.75, 18,052.70 and 9,100.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.75 : 18,052.70 = 9,100.94 : x
2. Step 2: Convert to fraction form
   13,086.75/18,052.70 = 9,100.94/x
3. Step 3: Cross multiply
   13,086.75x = 18,052.70 × 9,100.94
4. Step 4: Simplify right side
   13,086.75x = 164,296,403.77
5. Step 5: Solve for x
   x = 164,296,403.77/13,086.75
6. Step 6: Final answer
   x = 12,554.41