Finding the Fourth Proportional to 8,911.31, 13,366.36 and 3,072.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,911.31 : 13,366.36 = 3,072.02 : x
2. Step 2: Convert to fraction form
   8,911.31/13,366.36 = 3,072.02/x
3. Step 3: Cross multiply
   8,911.31x = 13,366.36 × 3,072.02
4. Step 4: Simplify right side
   8,911.31x = 41,061,709.89
5. Step 5: Solve for x
   x = 41,061,709.89/8,911.31
6. Step 6: Final answer
   x = 4,607.82