Finding the Fourth Proportional to 12,946.66, 17,864.71 and 7,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,946.66 : 17,864.71 = 7,280.50 : x
2. Step 2: Convert to fraction form
   12,946.66/17,864.71 = 7,280.50/x
3. Step 3: Cross multiply
   12,946.66x = 17,864.71 × 7,280.50
4. Step 4: Simplify right side
   12,946.66x = 130,064,021.16
5. Step 5: Solve for x
   x = 130,064,021.16/12,946.66
6. Step 6: Final answer
   x = 10,046.14