Finding the Fourth Proportional to 12,749.56, 19,127.61 and 3,984.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,749.56 : 19,127.61 = 3,984.58 : x
2. Step 2: Convert to fraction form
   12,749.56/19,127.61 = 3,984.58/x
3. Step 3: Cross multiply
   12,749.56x = 19,127.61 × 3,984.58
4. Step 4: Simplify right side
   12,749.56x = 76,215,492.25
5. Step 5: Solve for x
   x = 76,215,492.25/12,749.56
6. Step 6: Final answer
   x = 5,977.89