Finding the Fourth Proportional to 42,489.14, 63,717.86 and 12,495.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,489.14 : 63,717.86 = 12,495.34 : x
2. Step 2: Convert to fraction form
   42,489.14/63,717.86 = 12,495.34/x
3. Step 3: Cross multiply
   42,489.14x = 63,717.86 × 12,495.34
4. Step 4: Simplify right side
   42,489.14x = 796,176,196.72
5. Step 5: Solve for x
   x = 796,176,196.72/42,489.14
6. Step 6: Final answer
   x = 18,738.35