Finding the Fourth Proportional to 10,081.80, 15,111.90 and 3,839.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.80 : 15,111.90 = 3,839.40 : x
2. Step 2: Convert to fraction form
   10,081.80/15,111.90 = 3,839.40/x
3. Step 3: Cross multiply
   10,081.80x = 15,111.90 × 3,839.40
4. Step 4: Simplify right side
   10,081.80x = 58,020,628.86
5. Step 5: Solve for x
   x = 58,020,628.86/10,081.80
6. Step 6: Final answer
   x = 5,754.99