Finding the Fourth Proportional to 12,866.76, 17,839.35 and 12,434.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,866.76 : 17,839.35 = 12,434.76 : x
2. Step 2: Convert to fraction form
   12,866.76/17,839.35 = 12,434.76/x
3. Step 3: Cross multiply
   12,866.76x = 17,839.35 × 12,434.76
4. Step 4: Simplify right side
   12,866.76x = 221,828,035.81
5. Step 5: Solve for x
   x = 221,828,035.81/12,866.76
6. Step 6: Final answer
   x = 17,240.40