Finding the Fourth Proportional to 10,172.10, 15,228.45 and 7,256.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,172.10 : 15,228.45 = 7,256.10 : x
2. Step 2: Convert to fraction form
   10,172.10/15,228.45 = 7,256.10/x
3. Step 3: Cross multiply
   10,172.10x = 15,228.45 × 7,256.10
4. Step 4: Simplify right side
   10,172.10x = 110,499,156.05
5. Step 5: Solve for x
   x = 110,499,156.05/10,172.10
6. Step 6: Final answer
   x = 10,862.96