Finding the Fourth Proportional to 14,448.32, 19,938.56 and 8,160.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,448.32 : 19,938.56 = 8,160.72 : x
2. Step 2: Convert to fraction form
   14,448.32/19,938.56 = 8,160.72/x
3. Step 3: Cross multiply
   14,448.32x = 19,938.56 × 8,160.72
4. Step 4: Simplify right side
   14,448.32x = 162,713,005.36
5. Step 5: Solve for x
   x = 162,713,005.36/14,448.32
6. Step 6: Final answer
   x = 11,261.72