Finding the Fourth Proportional to 6,431.31, 8,872.88 and 3,776.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,431.31 : 8,872.88 = 3,776.76 : x
2. Step 2: Convert to fraction form
   6,431.31/8,872.88 = 3,776.76/x
3. Step 3: Cross multiply
   6,431.31x = 8,872.88 × 3,776.76
4. Step 4: Simplify right side
   6,431.31x = 33,510,719.39
5. Step 5: Solve for x
   x = 33,510,719.39/6,431.31
6. Step 6: Final answer
   x = 5,210.56