Finding the Fourth Proportional to 8,072.31, 12,103.29 and 3,137.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,072.31 : 12,103.29 = 3,137.89 : x
2. Step 2: Convert to fraction form
   8,072.31/12,103.29 = 3,137.89/x
3. Step 3: Cross multiply
   8,072.31x = 12,103.29 × 3,137.89
4. Step 4: Simplify right side
   8,072.31x = 37,978,792.66
5. Step 5: Solve for x
   x = 37,978,792.66/8,072.31
6. Step 6: Final answer
   x = 4,704.82