Finding the Fourth Proportional to 41,978.70, 62,953.35 and 12,388.70

Step by Step Solution

1. Step 1: Write the proportion equation
   41,978.70 : 62,953.35 = 12,388.70 : x
2. Step 2: Convert to fraction form
   41,978.70/62,953.35 = 12,388.70/x
3. Step 3: Cross multiply
   41,978.70x = 62,953.35 × 12,388.70
4. Step 4: Simplify right side
   41,978.70x = 779,910,167.15
5. Step 5: Solve for x
   x = 779,910,167.15/41,978.70
6. Step 6: Final answer
   x = 18,578.71