Finding the Fourth Proportional to 13,256.34, 18,293.82 and 7,287.90

Step by Step Solution

1. Step 1: Write the proportion equation
   13,256.34 : 18,293.82 = 7,287.90 : x
2. Step 2: Convert to fraction form
   13,256.34/18,293.82 = 7,287.90/x
3. Step 3: Cross multiply
   13,256.34x = 18,293.82 × 7,287.90
4. Step 4: Simplify right side
   13,256.34x = 133,323,530.78
5. Step 5: Solve for x
   x = 133,323,530.78/13,256.34
6. Step 6: Final answer
   x = 10,057.34