Finding the Fourth Proportional to 52,302.56, 78,453.18 and 12,860

Step by Step Solution

1. Step 1: Write the proportion equation
   52,302.56 : 78,453.18 = 12,860 : x
2. Step 2: Convert to fraction form
   52,302.56/78,453.18 = 12,860/x
3. Step 3: Cross multiply
   52,302.56x = 78,453.18 × 12,860
4. Step 4: Simplify right side
   52,302.56x = 1,008,907,894.80
5. Step 5: Solve for x
   x = 1,008,907,894.80/52,302.56
6. Step 6: Final answer
   x = 19,289.84