Finding the Fourth Proportional to 8,607.31, 12,906.70 and 3,059.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,607.31 : 12,906.70 = 3,059.82 : x
2. Step 2: Convert to fraction form
   8,607.31/12,906.70 = 3,059.82/x
3. Step 3: Cross multiply
   8,607.31x = 12,906.70 × 3,059.82
4. Step 4: Simplify right side
   8,607.31x = 39,492,171.14
5. Step 5: Solve for x
   x = 39,492,171.14/8,607.31
6. Step 6: Final answer
   x = 4,588.21