Finding the Fourth Proportional to 19,769.30, 29,664.89 and 8,090.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,769.30 : 29,664.89 = 8,090.72 : x
2. Step 2: Convert to fraction form
   19,769.30/29,664.89 = 8,090.72/x
3. Step 3: Cross multiply
   19,769.30x = 29,664.89 × 8,090.72
4. Step 4: Simplify right side
   19,769.30x = 240,010,318.82
5. Step 5: Solve for x
   x = 240,010,318.82/19,769.30
6. Step 6: Final answer
   x = 12,140.56