Finding the Fourth Proportional to 13,225.20, 18,250.77 and 7,256.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,225.20 : 18,250.77 = 7,256.89 : x
2. Step 2: Convert to fraction form
   13,225.20/18,250.77 = 7,256.89/x
3. Step 3: Cross multiply
   13,225.20x = 18,250.77 × 7,256.89
4. Step 4: Simplify right side
   13,225.20x = 132,443,830.31
5. Step 5: Solve for x
   x = 132,443,830.31/13,225.20
6. Step 6: Final answer
   x = 10,014.50