Finding the Fourth Proportional to 12,645.16, 17,448.42 and 7,927.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,645.16 : 17,448.42 = 7,927.72 : x
2. Step 2: Convert to fraction form
   12,645.16/17,448.42 = 7,927.72/x
3. Step 3: Cross multiply
   12,645.16x = 17,448.42 × 7,927.72
4. Step 4: Simplify right side
   12,645.16x = 138,326,188.20
5. Step 5: Solve for x
   x = 138,326,188.20/12,645.16
6. Step 6: Final answer
   x = 10,939.06