Finding the Fourth Proportional to 12,266.84, 16,921.50 and 7,787.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,266.84 : 16,921.50 = 7,787.56 : x
2. Step 2: Convert to fraction form
   12,266.84/16,921.50 = 7,787.56/x
3. Step 3: Cross multiply
   12,266.84x = 16,921.50 × 7,787.56
4. Step 4: Simplify right side
   12,266.84x = 131,777,196.54
5. Step 5: Solve for x
   x = 131,777,196.54/12,266.84
6. Step 6: Final answer
   x = 10,742.55