Finding the Fourth Proportional to 35,136.72, 52,725.87 and 12,965.54

Step by Step Solution

1. Step 1: Write the proportion equation
   35,136.72 : 52,725.87 = 12,965.54 : x
2. Step 2: Convert to fraction form
   35,136.72/52,725.87 = 12,965.54/x
3. Step 3: Cross multiply
   35,136.72x = 52,725.87 × 12,965.54
4. Step 4: Simplify right side
   35,136.72x = 683,619,112.89
5. Step 5: Solve for x
   x = 683,619,112.89/35,136.72
6. Step 6: Final answer
   x = 19,455.97