Finding the Fourth Proportional to 8,459.31, 12,685.83 and 2,911.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,459.31 : 12,685.83 = 2,911.12 : x
2. Step 2: Convert to fraction form
   8,459.31/12,685.83 = 2,911.12/x
3. Step 3: Cross multiply
   8,459.31x = 12,685.83 × 2,911.12
4. Step 4: Simplify right side
   8,459.31x = 36,929,973.43
5. Step 5: Solve for x
   x = 36,929,973.43/8,459.31
6. Step 6: Final answer
   x = 4,365.60