Finding the Fourth Proportional to 8,255.56, 12,384.56 and 2,990.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,255.56 : 12,384.56 = 2,990.96 : x
2. Step 2: Convert to fraction form
   8,255.56/12,384.56 = 2,990.96/x
3. Step 3: Cross multiply
   8,255.56x = 12,384.56 × 2,990.96
4. Step 4: Simplify right side
   8,255.56x = 37,041,708.62
5. Step 5: Solve for x
   x = 37,041,708.62/8,255.56
6. Step 6: Final answer
   x = 4,486.88