Finding the Fourth Proportional to 21,849.39, 32,765.72 and 7,806.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,849.39 : 32,765.72 = 7,806.78 : x
2. Step 2: Convert to fraction form
   21,849.39/32,765.72 = 7,806.78/x
3. Step 3: Cross multiply
   21,849.39x = 32,765.72 × 7,806.78
4. Step 4: Simplify right side
   21,849.39x = 255,794,728.55
5. Step 5: Solve for x
   x = 255,794,728.55/21,849.39
6. Step 6: Final answer
   x = 11,707.18