Finding the Fourth Proportional to 12,965.78, 19,449.06 and 3,606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.78 : 19,449.06 = 3,606.50 : x
2. Step 2: Convert to fraction form
   12,965.78/19,449.06 = 3,606.50/x
3. Step 3: Cross multiply
   12,965.78x = 19,449.06 × 3,606.50
4. Step 4: Simplify right side
   12,965.78x = 70,143,034.89
5. Step 5: Solve for x
   x = 70,143,034.89/12,965.78
6. Step 6: Final answer
   x = 5,409.86