Finding the Fourth Proportional to 172,435.55, 258,664.25 and 54,111.56

Step by Step Solution

1. Step 1: Write the proportion equation
   172,435.55 : 258,664.25 = 54,111.56 : x
2. Step 2: Convert to fraction form
   172,435.55/258,664.25 = 54,111.56/x
3. Step 3: Cross multiply
   172,435.55x = 258,664.25 × 54,111.56
4. Step 4: Simplify right side
   172,435.55x = 13,996,724,790.41
5. Step 5: Solve for x
   x = 13,996,724,790.41/172,435.55
6. Step 6: Final answer
   x = 81,170.76