Finding the Fourth Proportional to 12,756.71, 19,127.56 and 3,869.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,756.71 : 19,127.56 = 3,869.35 : x
2. Step 2: Convert to fraction form
   12,756.71/19,127.56 = 3,869.35/x
3. Step 3: Cross multiply
   12,756.71x = 19,127.56 × 3,869.35
4. Step 4: Simplify right side
   12,756.71x = 74,011,281.64
5. Step 5: Solve for x
   x = 74,011,281.64/12,756.71
6. Step 6: Final answer
   x = 5,801.75