Finding the Fourth Proportional to 12,756.65, 19,140.82 and 5,738.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,756.65 : 19,140.82 = 5,738.51 : x
2. Step 2: Convert to fraction form
   12,756.65/19,140.82 = 5,738.51/x
3. Step 3: Cross multiply
   12,756.65x = 19,140.82 × 5,738.51
4. Step 4: Simplify right side
   12,756.65x = 109,839,820.48
5. Step 5: Solve for x
   x = 109,839,820.48/12,756.65
6. Step 6: Final answer
   x = 8,610.40