Finding the Fourth Proportional to 42,601.50, 63,905.46 and 13,021.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,601.50 : 63,905.46 = 13,021.50 : x
2. Step 2: Convert to fraction form
   42,601.50/63,905.46 = 13,021.50/x
3. Step 3: Cross multiply
   42,601.50x = 63,905.46 × 13,021.50
4. Step 4: Simplify right side
   42,601.50x = 832,144,947.39
5. Step 5: Solve for x
   x = 832,144,947.39/42,601.50
6. Step 6: Final answer
   x = 19,533.23