Finding the Fourth Proportional to 11,172.72, 15,417.59 and 6,137.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,172.72 : 15,417.59 = 6,137.15 : x
2. Step 2: Convert to fraction form
   11,172.72/15,417.59 = 6,137.15/x
3. Step 3: Cross multiply
   11,172.72x = 15,417.59 × 6,137.15
4. Step 4: Simplify right side
   11,172.72x = 94,620,075.94
5. Step 5: Solve for x
   x = 94,620,075.94/11,172.72
6. Step 6: Final answer
   x = 8,468.85