Finding the Fourth Proportional to 52,379.92, 78,567.76 and 12,936.03

Step by Step Solution

1. Step 1: Write the proportion equation
   52,379.92 : 78,567.76 = 12,936.03 : x
2. Step 2: Convert to fraction form
   52,379.92/78,567.76 = 12,936.03/x
3. Step 3: Cross multiply
   52,379.92x = 78,567.76 × 12,936.03
4. Step 4: Simplify right side
   52,379.92x = 1,016,354,900.39
5. Step 5: Solve for x
   x = 1,016,354,900.39/52,379.92
6. Step 6: Final answer
   x = 19,403.52