Finding the Fourth Proportional to 42,171.42, 63,266.67 and 12,588.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,171.42 : 63,266.67 = 12,588.15 : x
2. Step 2: Convert to fraction form
   42,171.42/63,266.67 = 12,588.15/x
3. Step 3: Cross multiply
   42,171.42x = 63,266.67 × 12,588.15
4. Step 4: Simplify right side
   42,171.42x = 796,410,331.96
5. Step 5: Solve for x
   x = 796,410,331.96/42,171.42
6. Step 6: Final answer
   x = 18,885.07