Finding the Fourth Proportional to 42,524.96, 63,790.06 and 12,945

Step by Step Solution

1. Step 1: Write the proportion equation
   42,524.96 : 63,790.06 = 12,945 : x
2. Step 2: Convert to fraction form
   42,524.96/63,790.06 = 12,945/x
3. Step 3: Cross multiply
   42,524.96x = 63,790.06 × 12,945
4. Step 4: Simplify right side
   42,524.96x = 825,762,326.70
5. Step 5: Solve for x
   x = 825,762,326.70/42,524.96
6. Step 6: Final answer
   x = 19,418.30