Finding the Fourth Proportional to 28,245.42, 42,369.23 and 8,523.98

Step by Step Solution

1. Step 1: Write the proportion equation
   28,245.42 : 42,369.23 = 8,523.98 : x
2. Step 2: Convert to fraction form
   28,245.42/42,369.23 = 8,523.98/x
3. Step 3: Cross multiply
   28,245.42x = 42,369.23 × 8,523.98
4. Step 4: Simplify right side
   28,245.42x = 361,154,596.37
5. Step 5: Solve for x
   x = 361,154,596.37/28,245.42
6. Step 6: Final answer
   x = 12,786.31