Finding the Fourth Proportional to 35,981.72, 53,996.54 and 12,608.12

Step by Step Solution

1. Step 1: Write the proportion equation
   35,981.72 : 53,996.54 = 12,608.12 : x
2. Step 2: Convert to fraction form
   35,981.72/53,996.54 = 12,608.12/x
3. Step 3: Cross multiply
   35,981.72x = 53,996.54 × 12,608.12
4. Step 4: Simplify right side
   35,981.72x = 680,794,855.90
5. Step 5: Solve for x
   x = 680,794,855.90/35,981.72
6. Step 6: Final answer
   x = 18,920.58