Finding the Fourth Proportional to 12,491.06, 18,739.83 and 3,725.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,491.06 : 18,739.83 = 3,725.78 : x
2. Step 2: Convert to fraction form
   12,491.06/18,739.83 = 3,725.78/x
3. Step 3: Cross multiply
   12,491.06x = 18,739.83 × 3,725.78
4. Step 4: Simplify right side
   12,491.06x = 69,820,483.82
5. Step 5: Solve for x
   x = 69,820,483.82/12,491.06
6. Step 6: Final answer
   x = 5,589.64