Finding the Fourth Proportional to 12,087.28, 18,119.98 and 4,294.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.28 : 18,119.98 = 4,294.27 : x
2. Step 2: Convert to fraction form
   12,087.28/18,119.98 = 4,294.27/x
3. Step 3: Cross multiply
   12,087.28x = 18,119.98 × 4,294.27
4. Step 4: Simplify right side
   12,087.28x = 77,812,086.51
5. Step 5: Solve for x
   x = 77,812,086.51/12,087.28
6. Step 6: Final answer
   x = 6,437.52