Finding the Fourth Proportional to 52,047.96, 78,072.12 and 12,605

Step by Step Solution

1. Step 1: Write the proportion equation
   52,047.96 : 78,072.12 = 12,605 : x
2. Step 2: Convert to fraction form
   52,047.96/78,072.12 = 12,605/x
3. Step 3: Cross multiply
   52,047.96x = 78,072.12 × 12,605
4. Step 4: Simplify right side
   52,047.96x = 984,099,072.60
5. Step 5: Solve for x
   x = 984,099,072.60/52,047.96
6. Step 6: Final answer
   x = 18,907.54