Finding the Fourth Proportional to 13,626.17, 18,804.59 and 7,657.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,626.17 : 18,804.59 = 7,657.72 : x
2. Step 2: Convert to fraction form
   13,626.17/18,804.59 = 7,657.72/x
3. Step 3: Cross multiply
   13,626.17x = 18,804.59 × 7,657.72
4. Step 4: Simplify right side
   13,626.17x = 144,000,228.35
5. Step 5: Solve for x
   x = 144,000,228.35/13,626.17
6. Step 6: Final answer
   x = 10,567.92