Finding the Fourth Proportional to 12,908.10, 19,364.17 and 5,512.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,908.10 : 19,364.17 = 5,512.59 : x
2. Step 2: Convert to fraction form
   12,908.10/19,364.17 = 5,512.59/x
3. Step 3: Cross multiply
   12,908.10x = 19,364.17 × 5,512.59
4. Step 4: Simplify right side
   12,908.10x = 106,746,809.41
5. Step 5: Solve for x
   x = 106,746,809.41/12,908.10
6. Step 6: Final answer
   x = 8,269.76