Finding the Fourth Proportional to 18,300.09, 27,456.72 and 7,200.63

Step by Step Solution

1. Step 1: Write the proportion equation
   18,300.09 : 27,456.72 = 7,200.63 : x
2. Step 2: Convert to fraction form
   18,300.09/27,456.72 = 7,200.63/x
3. Step 3: Cross multiply
   18,300.09x = 27,456.72 × 7,200.63
4. Step 4: Simplify right side
   18,300.09x = 197,705,681.73
5. Step 5: Solve for x
   x = 197,705,681.73/18,300.09
6. Step 6: Final answer
   x = 10,803.54