Finding the Fourth Proportional to 4,689.83, 7,031.31 and 2,221.76

Step by Step Solution

1. Step 1: Write the proportion equation
   4,689.83 : 7,031.31 = 2,221.76 : x
2. Step 2: Convert to fraction form
   4,689.83/7,031.31 = 2,221.76/x
3. Step 3: Cross multiply
   4,689.83x = 7,031.31 × 2,221.76
4. Step 4: Simplify right side
   4,689.83x = 15,621,892.55
5. Step 5: Solve for x
   x = 15,621,892.55/4,689.83
6. Step 6: Final answer
   x = 3,331.01