Finding the Fourth Proportional to 42,443.29, 63,681.33 and 12,861.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42,443.29 : 63,681.33 = 12,861.37 : x
2. Step 2: Convert to fraction form
   42,443.29/63,681.33 = 12,861.37/x
3. Step 3: Cross multiply
   42,443.29x = 63,681.33 × 12,861.37
4. Step 4: Simplify right side
   42,443.29x = 819,029,147.22
5. Step 5: Solve for x
   x = 819,029,147.22/42,443.29
6. Step 6: Final answer
   x = 19,297.02