Finding the Fourth Proportional to 12,730.40, 17,570.94 and 7,426.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,730.40 : 17,570.94 = 7,426.16 : x
2. Step 2: Convert to fraction form
   12,730.40/17,570.94 = 7,426.16/x
3. Step 3: Cross multiply
   12,730.40x = 17,570.94 × 7,426.16
4. Step 4: Simplify right side
   12,730.40x = 130,484,611.79
5. Step 5: Solve for x
   x = 130,484,611.79/12,730.40
6. Step 6: Final answer
   x = 10,249.84