Finding the Fourth Proportional to 12,744.71, 19,117.05 and 3,980.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,744.71 : 19,117.05 = 3,980.37 : x
2. Step 2: Convert to fraction form
   12,744.71/19,117.05 = 3,980.37/x
3. Step 3: Cross multiply
   12,744.71x = 19,117.05 × 3,980.37
4. Step 4: Simplify right side
   12,744.71x = 76,092,932.31
5. Step 5: Solve for x
   x = 76,092,932.31/12,744.71
6. Step 6: Final answer
   x = 5,970.55