Finding the Fourth Proportional to 6,445.68, 9,671.12 and 3,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,445.68 : 9,671.12 = 3,158.72 : x
2. Step 2: Convert to fraction form
   6,445.68/9,671.12 = 3,158.72/x
3. Step 3: Cross multiply
   6,445.68x = 9,671.12 × 3,158.72
4. Step 4: Simplify right side
   6,445.68x = 30,548,360.17
5. Step 5: Solve for x
   x = 30,548,360.17/6,445.68
6. Step 6: Final answer
   x = 4,739.35