Finding the Fourth Proportional to 8,956.72, 12,360.21 and 4,977.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,956.72 : 12,360.21 = 4,977.82 : x
2. Step 2: Convert to fraction form
   8,956.72/12,360.21 = 4,977.82/x
3. Step 3: Cross multiply
   8,956.72x = 12,360.21 × 4,977.82
4. Step 4: Simplify right side
   8,956.72x = 61,526,900.54
5. Step 5: Solve for x
   x = 61,526,900.54/8,956.72
6. Step 6: Final answer
   x = 6,869.36