Finding the Fourth Proportional to 6,440.28, 8,888.46 and 3,645.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,440.28 : 8,888.46 = 3,645.72 : x
2. Step 2: Convert to fraction form
   6,440.28/8,888.46 = 3,645.72/x
3. Step 3: Cross multiply
   6,440.28x = 8,888.46 × 3,645.72
4. Step 4: Simplify right side
   6,440.28x = 32,404,836.39
5. Step 5: Solve for x
   x = 32,404,836.39/6,440.28
6. Step 6: Final answer
   x = 5,031.59