Finding the Fourth Proportional to 11,994.28, 17,997.54 and 8,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,994.28 : 17,997.54 = 8,090.50 : x
2. Step 2: Convert to fraction form
   11,994.28/17,997.54 = 8,090.50/x
3. Step 3: Cross multiply
   11,994.28x = 17,997.54 × 8,090.50
4. Step 4: Simplify right side
   11,994.28x = 145,609,097.37
5. Step 5: Solve for x
   x = 145,609,097.37/11,994.28
6. Step 6: Final answer
   x = 12,139.88