Finding the Fourth Proportional to 9,819.60, 14,666.96 and 8,436.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,819.60 : 14,666.96 = 8,436.96 : x
2. Step 2: Convert to fraction form
   9,819.60/14,666.96 = 8,436.96/x
3. Step 3: Cross multiply
   9,819.60x = 14,666.96 × 8,436.96
4. Step 4: Simplify right side
   9,819.60x = 123,744,512.66
5. Step 5: Solve for x
   x = 123,744,512.66/9,819.60
6. Step 6: Final answer
   x = 12,601.79