Finding the Fourth Proportional to 12,498.78, 17,213.31 and 12,226.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,498.78 : 17,213.31 = 12,226.62 : x
2. Step 2: Convert to fraction form
   12,498.78/17,213.31 = 12,226.62/x
3. Step 3: Cross multiply
   12,498.78x = 17,213.31 × 12,226.62
4. Step 4: Simplify right side
   12,498.78x = 210,460,600.31
5. Step 5: Solve for x
   x = 210,460,600.31/12,498.78
6. Step 6: Final answer
   x = 16,838.49