Finding the Fourth Proportional to 42,084.20, 63,136.04 and 12,501.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,084.20 : 63,136.04 = 12,501.40 : x
2. Step 2: Convert to fraction form
   42,084.20/63,136.04 = 12,501.40/x
3. Step 3: Cross multiply
   42,084.20x = 63,136.04 × 12,501.40
4. Step 4: Simplify right side
   42,084.20x = 789,288,890.46
5. Step 5: Solve for x
   x = 789,288,890.46/42,084.20
6. Step 6: Final answer
   x = 18,754.99