Finding the Fourth Proportional to 16,835.79, 25,214.72 and 8,386.91

Step by Step Solution

1. Step 1: Write the proportion equation
   16,835.79 : 25,214.72 = 8,386.91 : x
2. Step 2: Convert to fraction form
   16,835.79/25,214.72 = 8,386.91/x
3. Step 3: Cross multiply
   16,835.79x = 25,214.72 × 8,386.91
4. Step 4: Simplify right side
   16,835.79x = 211,473,419.31
5. Step 5: Solve for x
   x = 211,473,419.31/16,835.79
6. Step 6: Final answer
   x = 12,560.94