Finding the Fourth Proportional to 28,242.41, 42,362.52 and 8,520.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,242.41 : 42,362.52 = 8,520.42 : x
2. Step 2: Convert to fraction form
   28,242.41/42,362.52 = 8,520.42/x
3. Step 3: Cross multiply
   28,242.41x = 42,362.52 × 8,520.42
4. Step 4: Simplify right side
   28,242.41x = 360,946,462.66
5. Step 5: Solve for x
   x = 360,946,462.66/28,242.41
6. Step 6: Final answer
   x = 12,780.30