Finding the Fourth Proportional to 172,667.62, 259,036.58 and 72,828.18

Step by Step Solution

1. Step 1: Write the proportion equation
   172,667.62 : 259,036.58 = 72,828.18 : x
2. Step 2: Convert to fraction form
   172,667.62/259,036.58 = 72,828.18/x
3. Step 3: Cross multiply
   172,667.62x = 259,036.58 × 72,828.18
4. Step 4: Simplify right side
   172,667.62x = 18,865,162,856.89
5. Step 5: Solve for x
   x = 18,865,162,856.89/172,667.62
6. Step 6: Final answer
   x = 109,257.10