Finding the Fourth Proportional to 258,178.56, 387,419.42 and 108,407.34

Step by Step Solution

1. Step 1: Write the proportion equation
   258,178.56 : 387,419.42 = 108,407.34 : x
2. Step 2: Convert to fraction form
   258,178.56/387,419.42 = 108,407.34/x
3. Step 3: Cross multiply
   258,178.56x = 387,419.42 × 108,407.34
4. Step 4: Simplify right side
   258,178.56x = 41,999,108,786.54
5. Step 5: Solve for x
   x = 41,999,108,786.54/258,178.56
6. Step 6: Final answer
   x = 162,674.66