Finding the Fourth Proportional to 12,963.47, 17,889.72 and 7,297.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,963.47 : 17,889.72 = 7,297.12 : x
2. Step 2: Convert to fraction form
   12,963.47/17,889.72 = 7,297.12/x
3. Step 3: Cross multiply
   12,963.47x = 17,889.72 × 7,297.12
4. Step 4: Simplify right side
   12,963.47x = 130,543,428.60
5. Step 5: Solve for x
   x = 130,543,428.60/12,963.47
6. Step 6: Final answer
   x = 10,070.10