Finding the Fourth Proportional to 12,902.50, 17,809.25 and 8,426.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,902.50 : 17,809.25 = 8,426.94 : x
2. Step 2: Convert to fraction form
   12,902.50/17,809.25 = 8,426.94/x
3. Step 3: Cross multiply
   12,902.50x = 17,809.25 × 8,426.94
4. Step 4: Simplify right side
   12,902.50x = 150,077,481.20
5. Step 5: Solve for x
   x = 150,077,481.20/12,902.50
6. Step 6: Final answer
   x = 11,631.66