Finding the Fourth Proportional to 19,952.72, 29,928.78 and 5,160.44

Step by Step Solution

1. Step 1: Write the proportion equation
   19,952.72 : 29,928.78 = 5,160.44 : x
2. Step 2: Convert to fraction form
   19,952.72/29,928.78 = 5,160.44/x
3. Step 3: Cross multiply
   19,952.72x = 29,928.78 × 5,160.44
4. Step 4: Simplify right side
   19,952.72x = 154,445,673.46
5. Step 5: Solve for x
   x = 154,445,673.46/19,952.72
6. Step 6: Final answer
   x = 7,740.58