Finding the Fourth Proportional to 52,124.10, 78,185.52 and 12,681.30

Step by Step Solution

1. Step 1: Write the proportion equation
   52,124.10 : 78,185.52 = 12,681.30 : x
2. Step 2: Convert to fraction form
   52,124.10/78,185.52 = 12,681.30/x
3. Step 3: Cross multiply
   52,124.10x = 78,185.52 × 12,681.30
4. Step 4: Simplify right side
   52,124.10x = 991,494,034.78
5. Step 5: Solve for x
   x = 991,494,034.78/52,124.10
6. Step 6: Final answer
   x = 19,021.80