Finding the Fourth Proportional to 9,017.91, 12,456.72 and 7,256.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,017.91 : 12,456.72 = 7,256.16 : x
2. Step 2: Convert to fraction form
   9,017.91/12,456.72 = 7,256.16/x
3. Step 3: Cross multiply
   9,017.91x = 12,456.72 × 7,256.16
4. Step 4: Simplify right side
   9,017.91x = 90,387,953.40
5. Step 5: Solve for x
   x = 90,387,953.40/9,017.91
6. Step 6: Final answer
   x = 10,023.16