Finding the Fourth Proportional to 14,209.56, 19,608.48 and 7,920.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,209.56 : 19,608.48 = 7,920.72 : x
2. Step 2: Convert to fraction form
   14,209.56/19,608.48 = 7,920.72/x
3. Step 3: Cross multiply
   14,209.56x = 19,608.48 × 7,920.72
4. Step 4: Simplify right side
   14,209.56x = 155,313,279.71
5. Step 5: Solve for x
   x = 155,313,279.71/14,209.56
6. Step 6: Final answer
   x = 10,930.20