Finding the Fourth Proportional to 19,892.76, 29,842.56 and 8,199.60

Step by Step Solution

1. Step 1: Write the proportion equation
   19,892.76 : 29,842.56 = 8,199.60 : x
2. Step 2: Convert to fraction form
   19,892.76/29,842.56 = 8,199.60/x
3. Step 3: Cross multiply
   19,892.76x = 29,842.56 × 8,199.60
4. Step 4: Simplify right side
   19,892.76x = 244,697,054.98
5. Step 5: Solve for x
   x = 244,697,054.98/19,892.76
6. Step 6: Final answer
   x = 12,300.81