Finding the Fourth Proportional to 42,313.35, 63,469.89 and 12,731.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,313.35 : 63,469.89 = 12,731.15 : x
2. Step 2: Convert to fraction form
   42,313.35/63,469.89 = 12,731.15/x
3. Step 3: Cross multiply
   42,313.35x = 63,469.89 × 12,731.15
4. Step 4: Simplify right side
   42,313.35x = 808,044,372.72
5. Step 5: Solve for x
   x = 808,044,372.72/42,313.35
6. Step 6: Final answer
   x = 19,096.68