Finding the Fourth Proportional to 12,901.59, 19,355.72 and 4,136.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,901.59 : 19,355.72 = 4,136.58 : x
2. Step 2: Convert to fraction form
   12,901.59/19,355.72 = 4,136.58/x
3. Step 3: Cross multiply
   12,901.59x = 19,355.72 × 4,136.58
4. Step 4: Simplify right side
   12,901.59x = 80,066,463.55
5. Step 5: Solve for x
   x = 80,066,463.55/12,901.59
6. Step 6: Final answer
   x = 6,205.94