Finding the Fourth Proportional to 12,951.60, 17,870.70 and 7,285.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,951.60 : 17,870.70 = 7,285.59 : x
2. Step 2: Convert to fraction form
   12,951.60/17,870.70 = 7,285.59/x
3. Step 3: Cross multiply
   12,951.60x = 17,870.70 × 7,285.59
4. Step 4: Simplify right side
   12,951.60x = 130,198,593.21
5. Step 5: Solve for x
   x = 130,198,593.21/12,951.60
6. Step 6: Final answer
   x = 10,052.70