Finding the Fourth Proportional to 12,756.72, 19,135.68 and 3,522.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,756.72 : 19,135.68 = 3,522.72 : x
2. Step 2: Convert to fraction form
   12,756.72/19,135.68 = 3,522.72/x
3. Step 3: Cross multiply
   12,756.72x = 19,135.68 × 3,522.72
4. Step 4: Simplify right side
   12,756.72x = 67,409,642.65
5. Step 5: Solve for x
   x = 67,409,642.65/12,756.72
6. Step 6: Final answer
   x = 5,284.25