Finding the Fourth Proportional to 326,498.62, 489,937.01 and 136,942.12

Step by Step Solution

1. Step 1: Write the proportion equation
   326,498.62 : 489,937.01 = 136,942.12 : x
2. Step 2: Convert to fraction form
   326,498.62/489,937.01 = 136,942.12/x
3. Step 3: Cross multiply
   326,498.62x = 489,937.01 × 136,942.12
4. Step 4: Simplify right side
   326,498.62x = 67,093,012,815.86
5. Step 5: Solve for x
   x = 67,093,012,815.86/326,498.62
6. Step 6: Final answer
   x = 205,492.49