Finding the Fourth Proportional to 15,978.28, 23,959.12 and 4,882.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,978.28 : 23,959.12 = 4,882.72 : x
2. Step 2: Convert to fraction form
   15,978.28/23,959.12 = 4,882.72/x
3. Step 3: Cross multiply
   15,978.28x = 23,959.12 × 4,882.72
4. Step 4: Simplify right side
   15,978.28x = 116,985,674.41
5. Step 5: Solve for x
   x = 116,985,674.41/15,978.28
6. Step 6: Final answer
   x = 7,321.54