Finding the Fourth Proportional to 13,272.16, 18,315.72 and 7,606.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,272.16 : 18,315.72 = 7,606.78 : x
2. Step 2: Convert to fraction form
   13,272.16/18,315.72 = 7,606.78/x
3. Step 3: Cross multiply
   13,272.16x = 18,315.72 × 7,606.78
4. Step 4: Simplify right side
   13,272.16x = 139,323,652.58
5. Step 5: Solve for x
   x = 139,323,652.58/13,272.16
6. Step 6: Final answer
   x = 10,497.44