Finding the Fourth Proportional to 8,776.58, 12,111.21 and 4,796.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,776.58 : 12,111.21 = 4,796.90 : x
2. Step 2: Convert to fraction form
   8,776.58/12,111.21 = 4,796.90/x
3. Step 3: Cross multiply
   8,776.58x = 12,111.21 × 4,796.90
4. Step 4: Simplify right side
   8,776.58x = 58,096,263.25
5. Step 5: Solve for x
   x = 58,096,263.25/8,776.58
6. Step 6: Final answer
   x = 6,619.46