Finding the Fourth Proportional to 8,956.42, 13,434.76 and 3,113.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,956.42 : 13,434.76 = 3,113.20 : x
2. Step 2: Convert to fraction form
   8,956.42/13,434.76 = 3,113.20/x
3. Step 3: Cross multiply
   8,956.42x = 13,434.76 × 3,113.20
4. Step 4: Simplify right side
   8,956.42x = 41,825,094.83
5. Step 5: Solve for x
   x = 41,825,094.83/8,956.42
6. Step 6: Final answer
   x = 4,669.85