Finding the Fourth Proportional to 172,498.96, 258,733.61 and 105,013.47

Step by Step Solution

1. Step 1: Write the proportion equation
   172,498.96 : 258,733.61 = 105,013.47 : x
2. Step 2: Convert to fraction form
   172,498.96/258,733.61 = 105,013.47/x
3. Step 3: Cross multiply
   172,498.96x = 258,733.61 × 105,013.47
4. Step 4: Simplify right side
   172,498.96x = 27,170,514,191.73
5. Step 5: Solve for x
   x = 27,170,514,191.73/172,498.96
6. Step 6: Final answer
   x = 157,511.18