Finding the Fourth Proportional to 28,245.21, 42,368.05 and 7,185.27

Step by Step Solution

1. Step 1: Write the proportion equation
   28,245.21 : 42,368.05 = 7,185.27 : x
2. Step 2: Convert to fraction form
   28,245.21/42,368.05 = 7,185.27/x
3. Step 3: Cross multiply
   28,245.21x = 42,368.05 × 7,185.27
4. Step 4: Simplify right side
   28,245.21x = 304,425,728.72
5. Step 5: Solve for x
   x = 304,425,728.72/28,245.21
6. Step 6: Final answer
   x = 10,777.96