Finding the Fourth Proportional to 12,520.27, 17,276.99 and 7,215.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,520.27 : 17,276.99 = 7,215.51 : x
2. Step 2: Convert to fraction form
   12,520.27/17,276.99 = 7,215.51/x
3. Step 3: Cross multiply
   12,520.27x = 17,276.99 × 7,215.51
4. Step 4: Simplify right side
   12,520.27x = 124,662,258.04
5. Step 5: Solve for x
   x = 124,662,258.04/12,520.27
6. Step 6: Final answer
   x = 9,956.84