Finding the Fourth Proportional to 42,171.45, 63,270.89 and 12,589.53

Step by Step Solution

1. Step 1: Write the proportion equation
   42,171.45 : 63,270.89 = 12,589.53 : x
2. Step 2: Convert to fraction form
   42,171.45/63,270.89 = 12,589.53/x
3. Step 3: Cross multiply
   42,171.45x = 63,270.89 × 12,589.53
4. Step 4: Simplify right side
   42,171.45x = 796,550,704.83
5. Step 5: Solve for x
   x = 796,550,704.83/42,171.45
6. Step 6: Final answer
   x = 18,888.39