Finding the Fourth Proportional to 12,997.38, 19,495.90 and 3,136.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,997.38 : 19,495.90 = 3,136.59 : x
2. Step 2: Convert to fraction form
   12,997.38/19,495.90 = 3,136.59/x
3. Step 3: Cross multiply
   12,997.38x = 19,495.90 × 3,136.59
4. Step 4: Simplify right side
   12,997.38x = 61,150,644.98
5. Step 5: Solve for x
   x = 61,150,644.98/12,997.38
6. Step 6: Final answer
   x = 4,704.84