Finding the Fourth Proportional to 20,538.88, 30,789.86 and 7,382.05

Step by Step Solution

1. Step 1: Write the proportion equation
   20,538.88 : 30,789.86 = 7,382.05 : x
2. Step 2: Convert to fraction form
   20,538.88/30,789.86 = 7,382.05/x
3. Step 3: Cross multiply
   20,538.88x = 30,789.86 × 7,382.05
4. Step 4: Simplify right side
   20,538.88x = 227,292,172.13
5. Step 5: Solve for x
   x = 227,292,172.13/20,538.88
6. Step 6: Final answer
   x = 11,066.44