Finding the Fourth Proportional to 8,796.70, 12,139.17 and 4,817.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,796.70 : 12,139.17 = 4,817.78 : x
2. Step 2: Convert to fraction form
   8,796.70/12,139.17 = 4,817.78/x
3. Step 3: Cross multiply
   8,796.70x = 12,139.17 × 4,817.78
4. Step 4: Simplify right side
   8,796.70x = 58,483,817.20
5. Step 5: Solve for x
   x = 58,483,817.20/8,796.70
6. Step 6: Final answer
   x = 6,648.38