Finding the Fourth Proportional to 12,256.71, 18,328.56 and 9,100.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,256.71 : 18,328.56 = 9,100.14 : x
2. Step 2: Convert to fraction form
   12,256.71/18,328.56 = 9,100.14/x
3. Step 3: Cross multiply
   12,256.71x = 18,328.56 × 9,100.14
4. Step 4: Simplify right side
   12,256.71x = 166,792,462.00
5. Step 5: Solve for x
   x = 166,792,462.00/12,256.71
6. Step 6: Final answer
   x = 13,608.26