Finding the Fourth Proportional to 12,747.32, 19,117.72 and 3,977.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,747.32 : 19,117.72 = 3,977.72 : x
2. Step 2: Convert to fraction form
   12,747.32/19,117.72 = 3,977.72/x
3. Step 3: Cross multiply
   12,747.32x = 19,117.72 × 3,977.72
4. Step 4: Simplify right side
   12,747.32x = 76,044,937.20
5. Step 5: Solve for x
   x = 76,044,937.20/12,747.32
6. Step 6: Final answer
   x = 5,965.56