Finding the Fourth Proportional to 12,698.40, 19,047.36 and 4,902.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,698.40 : 19,047.36 = 4,902.72 : x
2. Step 2: Convert to fraction form
   12,698.40/19,047.36 = 4,902.72/x
3. Step 3: Cross multiply
   12,698.40x = 19,047.36 × 4,902.72
4. Step 4: Simplify right side
   12,698.40x = 93,383,872.82
5. Step 5: Solve for x
   x = 93,383,872.82/12,698.40
6. Step 6: Final answer
   x = 7,353.99