Finding the Fourth Proportional to 3,780.59, 5,671.29 and 1,831.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.59 : 5,671.29 = 1,831.32 : x
2. Step 2: Convert to fraction form
   3,780.59/5,671.29 = 1,831.32/x
3. Step 3: Cross multiply
   3,780.59x = 5,671.29 × 1,831.32
4. Step 4: Simplify right side
   3,780.59x = 10,385,946.80
5. Step 5: Solve for x
   x = 10,385,946.80/3,780.59
6. Step 6: Final answer
   x = 2,747.18