Finding the Fourth Proportional to 12,087.40, 16,266.15 and 12,087.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.40 : 16,266.15 = 12,087.40 : x
2. Step 2: Convert to fraction form
   12,087.40/16,266.15 = 12,087.40/x
3. Step 3: Cross multiply
   12,087.40x = 16,266.15 × 12,087.40
4. Step 4: Simplify right side
   12,087.40x = 196,615,461.51
5. Step 5: Solve for x
   x = 196,615,461.51/12,087.40
6. Step 6: Final answer
   x = 16,266.15