Finding the Fourth Proportional to 8,209.06, 12,311.30 and 3,528.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,209.06 : 12,311.30 = 3,528.88 : x
2. Step 2: Convert to fraction form
   8,209.06/12,311.30 = 3,528.88/x
3. Step 3: Cross multiply
   8,209.06x = 12,311.30 × 3,528.88
4. Step 4: Simplify right side
   8,209.06x = 43,445,100.34
5. Step 5: Solve for x
   x = 43,445,100.34/8,209.06
6. Step 6: Final answer
   x = 5,292.34