Finding the Fourth Proportional to 6,885.86, 10,328.56 and 2,990.27

Step by Step Solution

1. Step 1: Write the proportion equation
   6,885.86 : 10,328.56 = 2,990.27 : x
2. Step 2: Convert to fraction form
   6,885.86/10,328.56 = 2,990.27/x
3. Step 3: Cross multiply
   6,885.86x = 10,328.56 × 2,990.27
4. Step 4: Simplify right side
   6,885.86x = 30,885,160.18
5. Step 5: Solve for x
   x = 30,885,160.18/6,885.86
6. Step 6: Final answer
   x = 4,485.30