Finding the Fourth Proportional to 12,963.15, 17,889.72 and 7,300.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,963.15 : 17,889.72 = 7,300.20 : x
2. Step 2: Convert to fraction form
   12,963.15/17,889.72 = 7,300.20/x
3. Step 3: Cross multiply
   12,963.15x = 17,889.72 × 7,300.20
4. Step 4: Simplify right side
   12,963.15x = 130,598,533.94
5. Step 5: Solve for x
   x = 130,598,533.94/12,963.15
6. Step 6: Final answer
   x = 10,074.60