Finding the Fourth Proportional to 7,767.89, 10,774.60 and 7,487.68

Step by Step Solution

1. Step 1: Write the proportion equation
   7,767.89 : 10,774.60 = 7,487.68 : x
2. Step 2: Convert to fraction form
   7,767.89/10,774.60 = 7,487.68/x
3. Step 3: Cross multiply
   7,767.89x = 10,774.60 × 7,487.68
4. Step 4: Simplify right side
   7,767.89x = 80,676,756.93
5. Step 5: Solve for x
   x = 80,676,756.93/7,767.89
6. Step 6: Final answer
   x = 10,385.93