Finding the Fourth Proportional to 2,420.34, 3,630.64 and 688.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,420.34 : 3,630.64 = 688.83 : x
2. Step 2: Convert to fraction form
   2,420.34/3,630.64 = 688.83/x
3. Step 3: Cross multiply
   2,420.34x = 3,630.64 × 688.83
4. Step 4: Simplify right side
   2,420.34x = 2,500,888.45
5. Step 5: Solve for x
   x = 2,500,888.45/2,420.34
6. Step 6: Final answer
   x = 1,033.28