Finding the Fourth Proportional to 13,269.72, 18,312.60 and 7,605

Step by Step Solution

1. Step 1: Write the proportion equation
   13,269.72 : 18,312.60 = 7,605 : x
2. Step 2: Convert to fraction form
   13,269.72/18,312.60 = 7,605/x
3. Step 3: Cross multiply
   13,269.72x = 18,312.60 × 7,605
4. Step 4: Simplify right side
   13,269.72x = 139,267,323
5. Step 5: Solve for x
   x = 139,267,323/13,269.72
6. Step 6: Final answer
   x = 10,495.12