Finding the Fourth Proportional to 172,957.29, 259,443.68 and 53,005.56

Step by Step Solution

1. Step 1: Write the proportion equation
   172,957.29 : 259,443.68 = 53,005.56 : x
2. Step 2: Convert to fraction form
   172,957.29/259,443.68 = 53,005.56/x
3. Step 3: Cross multiply
   172,957.29x = 259,443.68 × 53,005.56
4. Step 4: Simplify right side
   172,957.29x = 13,751,957,546.86
5. Step 5: Solve for x
   x = 13,751,957,546.86/172,957.29
6. Step 6: Final answer
   x = 79,510.71