Finding the Fourth Proportional to 3,780.88, 5,671.31 and 969.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.88 : 5,671.31 = 969.71 : x
2. Step 2: Convert to fraction form
   3,780.88/5,671.31 = 969.71/x
3. Step 3: Cross multiply
   3,780.88x = 5,671.31 × 969.71
4. Step 4: Simplify right side
   3,780.88x = 5,499,497.57
5. Step 5: Solve for x
   x = 5,499,497.57/3,780.88
6. Step 6: Final answer
   x = 1,454.55