Finding the Fourth Proportional to 42,085.36, 63,136.68 and 12,500.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,085.36 : 63,136.68 = 12,500.56 : x
2. Step 2: Convert to fraction form
   42,085.36/63,136.68 = 12,500.56/x
3. Step 3: Cross multiply
   42,085.36x = 63,136.68 × 12,500.56
4. Step 4: Simplify right side
   42,085.36x = 789,243,856.54
5. Step 5: Solve for x
   x = 789,243,856.54/42,085.36
6. Step 6: Final answer
   x = 18,753.41