Finding the Fourth Proportional to 12,716.50, 17,548.78 and 7,748.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,716.50 : 17,548.78 = 7,748.50 : x
2. Step 2: Convert to fraction form
   12,716.50/17,548.78 = 7,748.50/x
3. Step 3: Cross multiply
   12,716.50x = 17,548.78 × 7,748.50
4. Step 4: Simplify right side
   12,716.50x = 135,976,721.83
5. Step 5: Solve for x
   x = 135,976,721.83/12,716.50
6. Step 6: Final answer
   x = 10,692.94