Finding the Fourth Proportional to 12,086.29, 18,127.27 and 7,690.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.29 : 18,127.27 = 7,690.69 : x
2. Step 2: Convert to fraction form
   12,086.29/18,127.27 = 7,690.69/x
3. Step 3: Cross multiply
   12,086.29x = 18,127.27 × 7,690.69
4. Step 4: Simplify right side
   12,086.29x = 139,411,214.12
5. Step 5: Solve for x
   x = 139,411,214.12/12,086.29
6. Step 6: Final answer
   x = 11,534.66