Finding the Fourth Proportional to 42,529.33, 63,789.42 and 12,947.41

Step by Step Solution

1. Step 1: Write the proportion equation
   42,529.33 : 63,789.42 = 12,947.41 : x
2. Step 2: Convert to fraction form
   42,529.33/63,789.42 = 12,947.41/x
3. Step 3: Cross multiply
   42,529.33x = 63,789.42 × 12,947.41
4. Step 4: Simplify right side
   42,529.33x = 825,907,774.40
5. Step 5: Solve for x
   x = 825,907,774.40/42,529.33
6. Step 6: Final answer
   x = 19,419.72