Finding the Fourth Proportional to 13,256.41, 18,293.86 and 7,288.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,256.41 : 18,293.86 = 7,288.18 : x
2. Step 2: Convert to fraction form
   13,256.41/18,293.86 = 7,288.18/x
3. Step 3: Cross multiply
   13,256.41x = 18,293.86 × 7,288.18
4. Step 4: Simplify right side
   13,256.41x = 133,328,908.13
5. Step 5: Solve for x
   x = 133,328,908.13/13,256.41
6. Step 6: Final answer
   x = 10,057.69