Finding the Fourth Proportional to 144,799.12, 217,169.52 and 39,628.72

Step by Step Solution

1. Step 1: Write the proportion equation
   144,799.12 : 217,169.52 = 39,628.72 : x
2. Step 2: Convert to fraction form
   144,799.12/217,169.52 = 39,628.72/x
3. Step 3: Cross multiply
   144,799.12x = 217,169.52 × 39,628.72
4. Step 4: Simplify right side
   144,799.12x = 8,606,150,100.61
5. Step 5: Solve for x
   x = 8,606,150,100.61/144,799.12
6. Step 6: Final answer
   x = 59,435.10