Finding the Fourth Proportional to 12,680.15, 19,009.89 and 8,507.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.15 : 19,009.89 = 8,507.43 : x
2. Step 2: Convert to fraction form
   12,680.15/19,009.89 = 8,507.43/x
3. Step 3: Cross multiply
   12,680.15x = 19,009.89 × 8,507.43
4. Step 4: Simplify right side
   12,680.15x = 161,725,308.48
5. Step 5: Solve for x
   x = 161,725,308.48/12,680.15
6. Step 6: Final answer
   x = 12,754.22