Finding the Fourth Proportional to 13,256.76, 18,294.24 and 7,288.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,256.76 : 18,294.24 = 7,288.28 : x
2. Step 2: Convert to fraction form
   13,256.76/18,294.24 = 7,288.28/x
3. Step 3: Cross multiply
   13,256.76x = 18,294.24 × 7,288.28
4. Step 4: Simplify right side
   13,256.76x = 133,333,543.51
5. Step 5: Solve for x
   x = 133,333,543.51/13,256.76
6. Step 6: Final answer
   x = 10,057.78