Finding the Fourth Proportional to 12,644.39, 17,426.00 and 10,134.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,644.39 : 17,426.00 = 10,134.81 : x
2. Step 2: Convert to fraction form
   12,644.39/17,426.00 = 10,134.81/x
3. Step 3: Cross multiply
   12,644.39x = 17,426.00 × 10,134.81
4. Step 4: Simplify right side
   12,644.39x = 176,609,224.40
5. Step 5: Solve for x
   x = 176,609,224.40/12,644.39
6. Step 6: Final answer
   x = 13,967.39