Finding the Fourth Proportional to 12,725.72, 17,561.46 and 7,136.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,725.72 : 17,561.46 = 7,136.84 : x
2. Step 2: Convert to fraction form
   12,725.72/17,561.46 = 7,136.84/x
3. Step 3: Cross multiply
   12,725.72x = 17,561.46 × 7,136.84
4. Step 4: Simplify right side
   12,725.72x = 125,333,330.19
5. Step 5: Solve for x
   x = 125,333,330.19/12,725.72
6. Step 6: Final answer
   x = 9,848.82