Finding the Fourth Proportional to 326,142.72, 489,161.60 and 89,430.48

Step by Step Solution

1. Step 1: Write the proportion equation
   326,142.72 : 489,161.60 = 89,430.48 : x
2. Step 2: Convert to fraction form
   326,142.72/489,161.60 = 89,430.48/x
3. Step 3: Cross multiply
   326,142.72x = 489,161.60 × 89,430.48
4. Step 4: Simplify right side
   326,142.72x = 43,745,956,685.57
5. Step 5: Solve for x
   x = 43,745,956,685.57/326,142.72
6. Step 6: Final answer
   x = 134,131.33