Finding the Fourth Proportional to 13,917.42, 19,200.24 and 7,947.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,917.42 : 19,200.24 = 7,947.72 : x
2. Step 2: Convert to fraction form
   13,917.42/19,200.24 = 7,947.72/x
3. Step 3: Cross multiply
   13,917.42x = 19,200.24 × 7,947.72
4. Step 4: Simplify right side
   13,917.42x = 152,598,131.45
5. Step 5: Solve for x
   x = 152,598,131.45/13,917.42
6. Step 6: Final answer
   x = 10,964.54