Finding the Fourth Proportional to 326,141.72, 489,160.10 and 89,429.48

Step by Step Solution

1. Step 1: Write the proportion equation
   326,141.72 : 489,160.10 = 89,429.48 : x
2. Step 2: Convert to fraction form
   326,141.72/489,160.10 = 89,429.48/x
3. Step 3: Cross multiply
   326,141.72x = 489,160.10 × 89,429.48
4. Step 4: Simplify right side
   326,141.72x = 43,745,333,379.75
5. Step 5: Solve for x
   x = 43,745,333,379.75/326,141.72
6. Step 6: Final answer
   x = 134,129.83