Finding the Fourth Proportional to 172,404.84, 258,604.66 and 77,568.05

Step by Step Solution

1. Step 1: Write the proportion equation
   172,404.84 : 258,604.66 = 77,568.05 : x
2. Step 2: Convert to fraction form
   172,404.84/258,604.66 = 77,568.05/x
3. Step 3: Cross multiply
   172,404.84x = 258,604.66 × 77,568.05
4. Step 4: Simplify right side
   172,404.84x = 20,059,460,037.54
5. Step 5: Solve for x
   x = 20,059,460,037.54/172,404.84
6. Step 6: Final answer
   x = 116,350.91