Finding the Fourth Proportional to 12,963.78, 17,891.58 and 7,300.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,963.78 : 17,891.58 = 7,300.62 : x
2. Step 2: Convert to fraction form
   12,963.78/17,891.58 = 7,300.62/x
3. Step 3: Cross multiply
   12,963.78x = 17,891.58 × 7,300.62
4. Step 4: Simplify right side
   12,963.78x = 130,619,626.78
5. Step 5: Solve for x
   x = 130,619,626.78/12,963.78
6. Step 6: Final answer
   x = 10,075.74