Finding the Fourth Proportional to 8,522.60, 11,763.39 and 7,636.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,522.60 : 11,763.39 = 7,636.88 : x
2. Step 2: Convert to fraction form
   8,522.60/11,763.39 = 7,636.88/x
3. Step 3: Cross multiply
   8,522.60x = 11,763.39 × 7,636.88
4. Step 4: Simplify right side
   8,522.60x = 89,835,597.82
5. Step 5: Solve for x
   x = 89,835,597.82/8,522.60
6. Step 6: Final answer
   x = 10,540.87