Finding the Fourth Proportional to 12,917.52, 19,375.56 and 4,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,917.52 : 19,375.56 = 4,158.72 : x
2. Step 2: Convert to fraction form
   12,917.52/19,375.56 = 4,158.72/x
3. Step 3: Cross multiply
   12,917.52x = 19,375.56 × 4,158.72
4. Step 4: Simplify right side
   12,917.52x = 80,577,528.88
5. Step 5: Solve for x
   x = 80,577,528.88/12,917.52
6. Step 6: Final answer
   x = 6,237.85