Finding the Fourth Proportional to 12,801.01, 17,665.47 and 7,136.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,801.01 : 17,665.47 = 7,136.12 : x
2. Step 2: Convert to fraction form
   12,801.01/17,665.47 = 7,136.12/x
3. Step 3: Cross multiply
   12,801.01x = 17,665.47 × 7,136.12
4. Step 4: Simplify right side
   12,801.01x = 126,062,913.78
5. Step 5: Solve for x
   x = 126,062,913.78/12,801.01
6. Step 6: Final answer
   x = 9,847.89