Finding the Fourth Proportional to 14,635.42, 20,196.71 and 7,920.89

Step by Step Solution

1. Step 1: Write the proportion equation
   14,635.42 : 20,196.71 = 7,920.89 : x
2. Step 2: Convert to fraction form
   14,635.42/20,196.71 = 7,920.89/x
3. Step 3: Cross multiply
   14,635.42x = 20,196.71 × 7,920.89
4. Step 4: Simplify right side
   14,635.42x = 159,975,828.18
5. Step 5: Solve for x
   x = 159,975,828.18/14,635.42
6. Step 6: Final answer
   x = 10,930.73