Finding the Fourth Proportional to 8,796.39, 12,139.47 and 4,817.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,796.39 : 12,139.47 = 4,817.90 : x
2. Step 2: Convert to fraction form
   8,796.39/12,139.47 = 4,817.90/x
3. Step 3: Cross multiply
   8,796.39x = 12,139.47 × 4,817.90
4. Step 4: Simplify right side
   8,796.39x = 58,486,691.82
5. Step 5: Solve for x
   x = 58,486,691.82/8,796.39
6. Step 6: Final answer
   x = 6,648.94