Finding the Fourth Proportional to 15,294.42, 21,106.52 and 8,920.83

Step by Step Solution

1. Step 1: Write the proportion equation
   15,294.42 : 21,106.52 = 8,920.83 : x
2. Step 2: Convert to fraction form
   15,294.42/21,106.52 = 8,920.83/x
3. Step 3: Cross multiply
   15,294.42x = 21,106.52 × 8,920.83
4. Step 4: Simplify right side
   15,294.42x = 188,287,676.81
5. Step 5: Solve for x
   x = 188,287,676.81/15,294.42
6. Step 6: Final answer
   x = 12,310.87