Finding the Fourth Proportional to 12,738.62, 19,111.19 and 3,973.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,738.62 : 19,111.19 = 3,973.61 : x
2. Step 2: Convert to fraction form
   12,738.62/19,111.19 = 3,973.61/x
3. Step 3: Cross multiply
   12,738.62x = 19,111.19 × 3,973.61
4. Step 4: Simplify right side
   12,738.62x = 75,940,443.61
5. Step 5: Solve for x
   x = 75,940,443.61/12,738.62
6. Step 6: Final answer
   x = 5,961.43