Finding the Fourth Proportional to 144,469.72, 216,467.44 and 138,932.96

Step by Step Solution

1. Step 1: Write the proportion equation
   144,469.72 : 216,467.44 = 138,932.96 : x
2. Step 2: Convert to fraction form
   144,469.72/216,467.44 = 138,932.96/x
3. Step 3: Cross multiply
   144,469.72x = 216,467.44 × 138,932.96
4. Step 4: Simplify right side
   144,469.72x = 30,074,462,182.82
5. Step 5: Solve for x
   x = 30,074,462,182.82/144,469.72
6. Step 6: Final answer
   x = 208,171.39