Finding the Fourth Proportional to 172,436.42, 258,665.56 and 54,112.43

Step by Step Solution

1. Step 1: Write the proportion equation
   172,436.42 : 258,665.56 = 54,112.43 : x
2. Step 2: Convert to fraction form
   172,436.42/258,665.56 = 54,112.43/x
3. Step 3: Cross multiply
   172,436.42x = 258,665.56 × 54,112.43
4. Step 4: Simplify right side
   172,436.42x = 13,997,022,520.29
5. Step 5: Solve for x
   x = 13,997,022,520.29/172,436.42
6. Step 6: Final answer
   x = 81,172.08