Finding the Fourth Proportional to 3,189.60, 4,807.72 and 3,057.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,189.60 : 4,807.72 = 3,057.76 : x
2. Step 2: Convert to fraction form
   3,189.60/4,807.72 = 3,057.76/x
3. Step 3: Cross multiply
   3,189.60x = 4,807.72 × 3,057.76
4. Step 4: Simplify right side
   3,189.60x = 14,700,853.91
5. Step 5: Solve for x
   x = 14,700,853.91/3,189.60
6. Step 6: Final answer
   x = 4,609.00