Finding the Fourth Proportional to 9,033.78, 12,465.86 and 5,256.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,033.78 : 12,465.86 = 5,256.21 : x
2. Step 2: Convert to fraction form
   9,033.78/12,465.86 = 5,256.21/x
3. Step 3: Cross multiply
   9,033.78x = 12,465.86 × 5,256.21
4. Step 4: Simplify right side
   9,033.78x = 65,523,151.71
5. Step 5: Solve for x
   x = 65,523,151.71/9,033.78
6. Step 6: Final answer
   x = 7,253.13