Finding the Fourth Proportional to 12,086.16, 18,116.04 and 4,688.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.16 : 18,116.04 = 4,688.40 : x
2. Step 2: Convert to fraction form
   12,086.16/18,116.04 = 4,688.40/x
3. Step 3: Cross multiply
   12,086.16x = 18,116.04 × 4,688.40
4. Step 4: Simplify right side
   12,086.16x = 84,935,241.94
5. Step 5: Solve for x
   x = 84,935,241.94/12,086.16
6. Step 6: Final answer
   x = 7,027.48