Finding the Fourth Proportional to 8,459.37, 12,689.89 and 2,911.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,459.37 : 12,689.89 = 2,911.98 : x
2. Step 2: Convert to fraction form
   8,459.37/12,689.89 = 2,911.98/x
3. Step 3: Cross multiply
   8,459.37x = 12,689.89 × 2,911.98
4. Step 4: Simplify right side
   8,459.37x = 36,952,649.71
5. Step 5: Solve for x
   x = 36,952,649.71/8,459.37
6. Step 6: Final answer
   x = 4,368.25