Finding the Fourth Proportional to 52,124.21, 78,185.56 and 12,681.39

Step by Step Solution

1. Step 1: Write the proportion equation
   52,124.21 : 78,185.56 = 12,681.39 : x
2. Step 2: Convert to fraction form
   52,124.21/78,185.56 = 12,681.39/x
3. Step 3: Cross multiply
   52,124.21x = 78,185.56 × 12,681.39
4. Step 4: Simplify right side
   52,124.21x = 991,501,578.73
5. Step 5: Solve for x
   x = 991,501,578.73/52,124.21
6. Step 6: Final answer
   x = 19,021.90