Finding the Fourth Proportional to 3,976.72, 5,488.20 and 2,298.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.72 : 5,488.20 = 2,298.70 : x
2. Step 2: Convert to fraction form
   3,976.72/5,488.20 = 2,298.70/x
3. Step 3: Cross multiply
   3,976.72x = 5,488.20 × 2,298.70
4. Step 4: Simplify right side
   3,976.72x = 12,615,725.34
5. Step 5: Solve for x
   x = 12,615,725.34/3,976.72
6. Step 6: Final answer
   x = 3,172.39