Finding the Fourth Proportional to 3,990.34, 5,505.24 and 2,310.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990.34 : 5,505.24 = 2,310.83 : x
2. Step 2: Convert to fraction form
   3,990.34/5,505.24 = 2,310.83/x
3. Step 3: Cross multiply
   3,990.34x = 5,505.24 × 2,310.83
4. Step 4: Simplify right side
   3,990.34x = 12,721,669.03
5. Step 5: Solve for x
   x = 12,721,669.03/3,990.34
6. Step 6: Final answer
   x = 3,188.12