Finding the Fourth Proportional to 42,433.60, 63,634.20 and 12,841.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,433.60 : 63,634.20 = 12,841.60 : x
2. Step 2: Convert to fraction form
   42,433.60/63,634.20 = 12,841.60/x
3. Step 3: Cross multiply
   42,433.60x = 63,634.20 × 12,841.60
4. Step 4: Simplify right side
   42,433.60x = 817,164,942.72
5. Step 5: Solve for x
   x = 817,164,942.72/42,433.60
6. Step 6: Final answer
   x = 19,257.50