Finding the Fourth Proportional to 12,952.72, 17,881.56 and 9,178.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,952.72 : 17,881.56 = 9,178.96 : x
2. Step 2: Convert to fraction form
   12,952.72/17,881.56 = 9,178.96/x
3. Step 3: Cross multiply
   12,952.72x = 17,881.56 × 9,178.96
4. Step 4: Simplify right side
   12,952.72x = 164,134,123.98
5. Step 5: Solve for x
   x = 164,134,123.98/12,952.72
6. Step 6: Final answer
   x = 12,671.79