Finding the Fourth Proportional to 12,956.15, 17,880.85 and 7,651.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,956.15 : 17,880.85 = 7,651.46 : x
2. Step 2: Convert to fraction form
   12,956.15/17,880.85 = 7,651.46/x
3. Step 3: Cross multiply
   12,956.15x = 17,880.85 × 7,651.46
4. Step 4: Simplify right side
   12,956.15x = 136,814,662.81
5. Step 5: Solve for x
   x = 136,814,662.81/12,956.15
6. Step 6: Final answer
   x = 10,559.82