Finding the Fourth Proportional to 172,298.43, 258,463.85 and 50,719.05

Step by Step Solution

1. Step 1: Write the proportion equation
   172,298.43 : 258,463.85 = 50,719.05 : x
2. Step 2: Convert to fraction form
   172,298.43/258,463.85 = 50,719.05/x
3. Step 3: Cross multiply
   172,298.43x = 258,463.85 × 50,719.05
4. Step 4: Simplify right side
   172,298.43x = 13,109,039,639.02
5. Step 5: Solve for x
   x = 13,109,039,639.02/172,298.43
6. Step 6: Final answer
   x = 76,083.34