Finding the Fourth Proportional to 258,056.69, 387,065.89 and 108,290.93

Step by Step Solution

1. Step 1: Write the proportion equation
   258,056.69 : 387,065.89 = 108,290.93 : x
2. Step 2: Convert to fraction form
   258,056.69/387,065.89 = 108,290.93/x
3. Step 3: Cross multiply
   258,056.69x = 387,065.89 × 108,290.93
4. Step 4: Simplify right side
   258,056.69x = 41,915,723,399.41
5. Step 5: Solve for x
   x = 41,915,723,399.41/258,056.69
6. Step 6: Final answer
   x = 162,428.36