Finding the Fourth Proportional to 138,964.56, 208,725.79 and 82,914.05

Step by Step Solution

1. Step 1: Write the proportion equation
   138,964.56 : 208,725.79 = 82,914.05 : x
2. Step 2: Convert to fraction form
   138,964.56/208,725.79 = 82,914.05/x
3. Step 3: Cross multiply
   138,964.56x = 208,725.79 × 82,914.05
4. Step 4: Simplify right side
   138,964.56x = 17,306,300,588.35
5. Step 5: Solve for x
   x = 17,306,300,588.35/138,964.56
6. Step 6: Final answer
   x = 124,537.51